PDF manual (instructions)
Contents
1. DYOO000O0O000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000OO Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Calibrating the Soko Gauge g 8 2 Calibrating the Soko Gauge The absolute horizontal spirit bubble level of the Soko Gauge is already calibrated when it comes to you Nevertheless you might find yourself in a situation where you want to recalibrate the Soko Gauge The recalibration doesnt need to be done in our factory You can do it at home All you need is a stable and horizontal surface which is already in spirit bubble level 1 Remove the battery cover of the Soko Gauge 2 Press and hold the ON ZERO button while replacing the battery cover The whole display is lit up 3 Release the ON ZERO button The display shows 1 4 Place the Soko Gauge on the stable horizontal surface and press the ON ZERO button once 5 The 1 will flash a few times and then change to 2 6 Turn the Soko i 180 so the splay faces on the other side www Soko Heli Tools com Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 Calibrating the Soko Gauge O 7 Press the ON ZERO button once The 2 will flash a few times i aD e lt wiod sjooL H V 0YOS MMM LA2. 4mm swash distance and 13mm servo horn main blade pitch delta pos neg on same servo angle 3 2 1 0 1 2 3 This is of course just theoretically possible An increase of just the swash distance is not possible due to mechanical binding In practice you can compensate by telling the FBL system to throw the servo arm further when applying full negative transmitter pitch than on full positive transmitter pitch see section 6 4 on page 28 Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 A brief history of head geometry O 8 3 2 Involving all three cyclic servos When moving through the whole range of transmitter pitch we assumed the same rela tionship between the servo horn rotations and main blade pitch on all three cyclic servos In other words all three servos use the same curve In real life though this isn t the case Just minor differences in the linkage lengths lead to different curves for each servo In the following graph each line is one servo on the head Goblin 700 HPS 30 20 10 servo horn angle an 45 ds 25 15 4 ea 5 15 25 35 45 10 20 Servo 1 perfect linkage length Servo 2 servo linkage 1mm off Servo 3 servo linkage 1 5mm off Q a v 2 E 30 The blue curve is the same as in the first graph in section 8 3 1 on page 44 and represents the ideal head from the servo horn up to the main blade The red curve shows the r
3. you know exactly how to setup a helicopter right So go for it FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUuvMuOs LSV4 GUVMUOsA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMUOSI LSVA 6 Setup done Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Eager pilot z Finally have a look at section 4 2 2 on page 8 to see how to pack the Soko Kit securely so you can toss it in your toolbox It cant go faster If you still have time left fly over the pictures and text of the setup pro cedures of section 6 on page 18 especially section 6 1 on page 18 and section 6 6 on page 31 The next time you use the Soko Kit you wont have to read anything at all FAS37 D RIARBDI ASS7F DQRIARPI ASSF SQRIARRI ASSFDAQRIARDE ASS7 DQRIA RPL ASS4F SQRIARRIASSF DQRIARDE ASSF DQRIARBIFAST FORWARD Cad WMG S S DGdWMG S S DAdWMaG 5 S DSdvMeG S SY DEdwMae ES SY DEdwMaG ES SYNES SY Daw wMee Es 97 DYVMuos LSV4 Download the latest instructions Www SsSoko heli tools com ST INSTRUCTIONS v2 5 Overview of the setup process SOKO 4 Introduction and special notes Please read this chapter carefully to become familiar with the Soko Kit and terms that are used in this manual 4 1 Overview of the setup process The following chart gives an overview of the setup the order of the processes and a basic sum up of each process It is perfect for the first time you use the Soko Kit or to come back a
4. 2 3 Soko Helical The Soko Helical is the most versatile mount ing platform for gauges like the Soko Gauge It fits all helicopter brands and sizes Depending on the size of the helicopter you choose the right hole to mount the Soko Heli cal in place of a main blade The five holes around the centre are used to mount the Soko Gauge The five holes on the edge are used to mount it in place of a main blade The coloured triangles show the corresponding holes for each size e Yellow 800 770 700 size 14mm blade grip opening e Purple 630 600 550 size 12mm blade grip opening e Orange 500 size 10mm blade grip opening e Red 360 450 size 4 5mm blade grip opening e Blue 250 size 3mm blade grip opening The hole in the middle circled green mounts the Soko Helical in place of the head stop per disc FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUvVMuOs LSVA GUVMYOA LSVA GUVMUOA LSVA GUVMAOSA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMUOSA LSVA GUVMUOA LSVA GUVMUOA LSVA Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 The Soko Kit z 4 2 4 Soko Gauge The Soko Gauge measures the tilting angle indicated by the blue lines with a resolution of 0 1 Ihe green part of the display shows absolute spirit level relative to earth also known as horizontal vertical level angle We refer to this angle as absolute level angle i
5. M1 6 M2 or M3 supplied with the Soko Kit for your head stopper disc thread in the rotor head Use at least one washer and put it in the centre hole of the Soko Helical To gain access to the centre hole move the Soko Gauge as far out as possible Next screw the Soko Helical tight onto the rotor head where the head stopper disc was placed The measuring axis of the Soko Gauge green needs to be perpendicular yel low to the line of the main blades red The Soko Helical should sit firmly and turn with the rotor head Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 With head stopper disc option O 7 Move the Soko Gauge as close to the centre as possible red arrows and screw it tight from underneath Depending on your helicopter size and brand as well as your tools it may be hard to reach the two screws If this is too difficult screw tight the Soko Gauge in Step 5 But be sure to leave enough space around the centre hole to screw the Soko Helical onto the rotor head Another option is to use the velcro instead of the screws ir pr a 3 ag com A brg 8 The Soko Kit is now mounted as the head stopper disc Q g D Q Q gt g gt Q g gt Q g X Y gt Q N g V Q Q 2 Q Q Q Q Q 2 Q Q Q Q Q Q Q g gt 9 gt S gt g The Soko Kit wobbles on the ro Use the Without head stopper disc version section 5 1 on tor head is tilted or doesn t
6. SY V QC Download the latest instructions Www SsSoko heli tools com Ts INSTRUCTIONS v2 5 Setup of tail pitch SOKO 6 Measure the distance between the centre of the two tail blade screws a and the distance from the screw to the aligned corner on the tip of the blade b Due to the perpendicular tail alignment the formed shape is a rectangle In our example a 66 5mm and b 115mm x S 7 Move the tail slider to the position you want to know the angle of 8 Measure the distance between the two corners off the tips of the tail blade c At zero pitch this distance is equal to a but when pitch is applied the two tips move away from each other In our example c 125 5mm 9 Enter all three dimensions into our calculator on our website Usefull stuff Tail pitch calculator to get the tail pitch angle In our example the tail pitch angle is 27 5 In addition you can calculate the distance c for a given tail pitch as well Dont get caught up in decimal places of the numbers Due to the play of each tail me chanic and the possible accuracy of measuring a b and c there is no point of dealing with fractions here Download the latest instructions WwWww soko heli tools com ers INSTRUCTIONS v2 5 General FAQ and troubleshooting 8 Appendix 8 1 General FAQ and troubleshooting Some questions are frequently asked via email or in forums Find answers to the most fre quent one below If you like to get
7. angle on the Soko Gauge because it won t show 0 Just use the relative angle of the Soko Gauge for your meas urements by pressing the ZERO button to reset the relative angle Now you can apply pitch nick or roll to get your angles using the relative angle on the Soko Gauge Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 General FAQ and troubleshooting O During the setup procedures No noticed that the whole heli tilts We are proud NOT to use electronic sensors for the meas to the side where the Soko Kit is urement in our Soko Gauge because all of them suffer from mounted Is this a problem temperature and age drift It uses a mechanical system and just displays the result digitally The Soko Gauge may cause tilting especially on little helicop ters First of all make sure your skids are not the problem see be ginning of section 6 1 on page 18 Even if the heli still tilts it won t influence the measurement The measurement axis is always perpendicular to the tilt di rection and therefore doesn t affect the measurement at all Have a look how Bobb setup his TRex 250 Are there any other useful re We provide a lot of other information for the hobby on our _ sources website Under Useful stuff you find a LiPo calculator PSU and charger calculator and the tail pitch calculator We will add more sections in future so check back frequently
8. of main rotor shaft 1 Turn the rotor head so the main blade axis red is at right angles yellow to the longitudinal axis of the helicopter blue 2 Recall the final target angle In our case it is 68 2 when the main shaft is in absolute vertical position 3 Now prevent the rotor head from rotating This is highly dependent on your brand and size of heli For example use a tape or cord to tie the tail gear to the main gear 4 Assemble everything batteries canopy etc ready to fly 5 Lift the helicopter by the rotor head Be sure the heli can nick as freely as possible Another and more accurate way to do this is to build a handle out of strings which attaches on the rotor head or hang it from the ceiling If the blade grip with the Soko Kit tends to rotate use a cable tie to fix it 6 Read the absolute angle on the Soko Gauge The target is the final target angle of step 2 68 2 in our example 7 Place the helicopter back on the surface and adjust the centre of gravity ac cording to the angle The common way to do that is to slightly change the position of the main battery 8 Repeat step 5 to 7 until the final target angle is achieved as close as possible to the angle of step 2 Don t forget to mark the final position of the battery 9 The centre of gravity is now adjusted Download the latest instructions Www SsSoko heli tools com ST INSTRUCTIONS v2 5 Setup of servo horns SOKO 7 Additi
9. re E ee rE a oe 5 3 2 Thorough RODOVISUs 4 3 sd eadues chee rriser phate eenaa 4 Introduction and special notes 0 00 cee es 4 2 THE SOKO All vegan dacu ndia booed woe eds sso eee ee eae ne Bas 4 2 1 The components of the Soko Kit 2 lt 2 25 224 250660 256 teehee tees eet escenndu Hes 4 2 3 Soko Helical 4 2 4 SKG AUGE a a N a A a ere N N SN 4 3 Preparations and h intS naana aaan aaa aa 11 4 4 Helicopter with a flybar 0 0 0 eee eens 11 4 4 1 Testing the sensitivity of a flybar input nananana aaaea aa eee 11 4 4 2 Additional things you can dO s4 ccewe kn oe ekS es deeded ghwktonene Lento ous a 11 4 5 FAI OWES o oo s6 ccm woe obs Sh we 4d ade dae We See aac ad SUR A ae a wed 12 5 Mo oun ng positions s aa a a a a ata es a a a 13 54 OS IU ibe I a iaraat ae cect esate eso ce aes con gh tO eh Den a BO cee ie Reh E 13 Position 2 as main blade Setup of swash plate zero pitch and blade tracking 6 3 Setup of collective pitch iced nananana nananana naaa 26 6 4 Setup of swash plate at full pitch and pitch consistency 28 Seip OrcycliG DUC ss i saeeecneseeetescgee ct acess arD anea E o a A third way to check the CoG T Additional setup procedures 0000 e ee es 35 1 1 Setup of servo MOMS 1 ee eee eens 39 f2 SWP Ol all ORCA bes reari kaain aii aria a aE aaa aAa e D eum a ee Ge 36 T2251 When is it necessary is asaneceewses ce teh k OOS ee
10. the following may not be rep resentative for the brand or size itself or be free of errors 8 3 1 Terms and basics A servo horn setup like in section 7 1 on page 35 a FBL system with default servo throws and a 45 pitch curve in your transmitter lead to a linear relation between your throttle stick position on your transmitter and the rotation angle of the servo horn e When the transmitter stick is in middle position the servo horn angle is 0 e When the transmitter stick is in full upper position the servo horn has a positive angle i e 25 e When the transmitter stick is in full lower position the servo horn has the same angle like in the full upper position but just negative i e 25 In other words At full upper and full lower position the absolute angle is the same The term transmitter pitch is defined as the collective pitch you apply on your transmit ter with the throttle stick You will see the transmitter pitch is not the same as the main blade pitch In addition the term servo horn angle refers to the angle relative to the servo horn neu tral position equal when 0 transmitter pitch is applied In respect to section 7 1 on page 35 this neutral position is 90 vertical oriented servo i e on a Warp 360 or 0 horizontal oriented servo i e on a Goblin 700 in relation to the Servo Case Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 A brief history
11. the servo horn itself has to face 4 Activate your servo mid point setup of your FBL system and or apply 0 pitch on your transmitter The servos will move into their default middle position 5 Mount the servo horns on all three servos according to step 3 Try to get as close as possible to 90 for vertical oriented servos or 0 for horizontal be tween servo horn axis and servo case longitudinal axis as possible 6 Setup the swash plate type and servo moving directions in your FBL system see the manual 7 Go back to the servo mid point setup 8 Adjust the mid points of each servo so the angle between the servo horn axis and the longitudinal axis of the servo case is 90 for vertical or 0 for hori zontal Use a ruler or any other object with a right angle 9 Your servo horns are now 90 respectively 0 when zero pitch is applied Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Setup of tail pitch g 7 2 Setup of tail pitch 7 2 1 When is it necessary The topic of measuring the tail pitch is quite misleading especially for beginners and in termediate pilots in our great hobby who do not fully understand the physics aerodynam ics and background of it We want to try to point out the situations when a measurement and setup of the tail pitch could be viable In short You probably wont need it But lets think about the tail setup for a moment and investigate the ne
12. tools com 50K INSTRUCTIONS v2 5 A brief history of head geometry 30 20 10 servo horn angle 45 35 25 15 Pa 5 15 25 35 45 0 i Goblin 700 HPS TRex 550v2 Warp 360 lt Q a v a 2 E 30 The linear trend line black for the Goblin 700 HPS shows clearly a non linear relation A more interesting graph is the delta difference of main blade pitch when applying the same transmitter pitch to the positive and to the negative In other words when applying the same absolute servo horn angle 45 40 Goblin 700 HPS TRex 550v2 servo horn angle Warp 360 main blade pitch delta pos neg on same servo angle 3 2 1 0 1 2 3 Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 A brief history of head geometry O When applying the same amount of transmitter pitch in the positive and the negative di rection the resulting positive and negative blade pitch is not the same absolute value The difference follows the line in the graph For example When the full transmitter pitch positive negative results in a 25 25 rotation of the servo horn you will get 0 25 more positive main blade pitch than negative on a Goblin 700 HPS and almost the same on a TRex 550v2 The head geometry of the Warp 360 leads to 1 0 more positive pitch than negative Analysing the delta graph A perfect delta curve would be a vertical lin
13. 4 Note the absolute angle the Soko Gauge displays In our example it is 66 3 5 Turn the head 180 so the main blade axis red is again perpendicular yel low to the longitudinal axis of the helicopter blue But now the ball red ar row faces to the front FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUVvMuOs LSVA GUVMAUOA LSVA GUVMUYOA LSVA GUVMUOSA LSVA GUVMAUOA LSVA GUVMUOA LSVA GUVMUOSI LSVA GUVMUOA LSVA GUVMUOA LSVS 6 Note the absolute angle the Soko Gauge displays In our example it is 70 1 Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 Absolute vertical alignment of main rotor shaft KO 7 Calculate the target angle by adding the angles of step 4 and 6 and dividing the result by 2 In our example the target angle is 68 2 calculation 66 3 70 1 2 68 2 8 If your angle of step 4 is greater than the target angle you have to raise the helicopter at the back If your angle of step 6 is greater than the target angle as it is for our example you have to raise the helicopter at the front One way to achieve small changes of the angle is to put sheets of paper red hatched area under the skids or chassis under the front in our example until you read the target angle Be sure the head does not rotate as you place the sheets of paper If so reposition the head after you put the sheets of paper un d
14. 9 The Soko Gauge is now calibrated If the display shows 1 again instead of going back to normal operation mode in step 8 the surface you are using is not in spirit bubble level Re level the surface with a third party tool and start all over Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 A brief history of head geometry 8 3 A brief history of head geometry This section goes into detail about head geometry and why a 90 servo horn is not as important as you might think This is due to different reasons and has some limitations of course For example all information below assumes you setup your helicopter with the Soko Kit and as described in this instructional PDF But in a nutshell An eyeballed 90 servo horn using a ruler is all you need see section 7 1 on page 35 This section is in the appendix on purpose With the setup procedures above you will get an awesome flying helicopter This section is designed to help you capitalize on the very last possibilities of getting an even more mechanically precise setup As with all things put to the extreme it takes much more effort to get from 99 to 99 9 as from 90 to 99 But let s start from the beginning DISCLAIMER This section is based on our research on the given topic and one unit of the helicopter size and brand mentioned We did not receive any information or data from the manufacturers Although thoroughly investigated
15. PS servo throw angle 25 20 15 10 5 5 10 15 20 25 r Q a v amp re At 0 servo throw the main blade pitch on each of the 3 servos is 0 which gives a perfect perpendicular swash plate in relation to the main shaft When transmitter pitch equals servo throw is applied the main blade pitch differs more and more between each servo the more transmitter pitch is applied This problem is addressed with the setup procedure in section 6 4 on page 28 Adjusted servo end points With the setup procedure in section 6 4 on page 28 the servo end points equals servo throw are adjusted in each direction of each servo to get the same blade pitch and as a result a perpendicular swash plate in relation to the main shaft at full transmitter pitch The same procedure deals with the delta between full negative and full positive transmitter pitch On the Warp 360 the setup servo throw for full negative transmitter pitch is more than for full positive transmitter pitch This leads to the same absolute main blade pitch i e 12 and 12 despite the shown delta curve of the Warp 360 Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 A brief history of head geometry g 8 3 3 After setup completion With the Soko Kit and all its setup procedures the helicopter has e aperpendicular swash plate at 0 transmitter pitch e true 0 main blade pitch at mid throttle stick
16. She RES whe bee See ES ca ee Xs 36 7 2 2 Setup the maximum tail pitch ose eke Oo sees eee on Gon Babee Y 4un eed eeee ee of 8 APPONI o 660550540 28h R FFAG ENESE RIFFEN ETE EP Rhee ees 40 8 1 General FAQ and troubleshooting 0 0 00 cee ee 40 8 2 Calibrating the Soko Gauge 00 ccc eens 42 8 3 A brief history of head geometry 0 cee 44 8 3 1 Terms and basics n annaa naaa 44 8 3 2 Involving all three cyclic servos lt 44 wate teas ct waop ee eke coe bah ee Sew a daw eed 49 8 3 3 After setup completion n nananana aaa ae ded eee ares oe ge ered eee eee eee 52 8 3 4 A mechanically perfect setup 0 0 ee eee eens 53 6 3 5 CONCUSSION eee r E ee ENEE eee eee E eee EREE 54 8 4 With head stopper disc option a n aaan aaaea a 55 8 4 1 POSION Te sesoses 6088 25 0c00 8007 bee mad E SENERA EEA Re 55 8 4 2 Absolute vertical alignment of main rotor shaft 0 20 0 00 cc ee 58 8 4 3 Check the COG lt a ee hee 8 ee BS ee ho a oe eS eh ee ow BS ee ee 60 KO SK INSTRUCTIONS v2 5 g 1 Do you need to read these instructions NO if you own a mobile device with Android or iOS just go to the Google Play Store or Apple App Store and search for the Soko Heli Toolbox application This instructions PDF has still its place though It holds much more information and trouble shooting than the mobile application So if you running into troubles or just want to know everyth
17. We perfect your setup so you can perfect your thumbs SOK Instructions v2 5 SOKO KIT Soko Heli Tools Limited Tena rawa atu koutou mo te kowhiranga a matou Putaiki kia whakapai ki ki wnakahangu taua mea kia rekareka hoki Maori language of the native people of New Zealand Thank you for choosing our products All the best in using the tools Kia ora Hello Thanks again for buying our products Ensure you are using the latest version of these instructions Get the latest version at www soko heli tools com Instructions Please read the whole document before you start We use high resolution pictures throughout the document Feel free to use the zoom function of your PDF reader to get a closer look at the pictures Have fun and keep flying Yours Soko Heli Tools Team Published by Soko Heli Tools Limited Auckland NZ All rights including reproduction by any method e g microfilming photocopy or the capture in electronic data processing systems or any translations are reserved and require prior written approval Reprinting also in part is prohibited The information provided reflects the current technical specifications at the time of writing We reserve the right to change the physical or technical specifications Subject to alterations and errors 2015 by Soko Heli Tools Limited Instructions v2 5 Soko Kit Table of Content What kind of hobbyist are you 0 000 cee 3 1 BEONE peen E eee ee ee
18. ain blade pitch between servo 2 and servo 3 at 45 is almost 2 5 Of course the servo end points are adjusted to compensate for this deflection but only for collective pitch How the FBL system includes different servo end points in the cyclic pitch mixing is not exactly known and is probably different on each FBL system So the only way to avoid this problem completely is to get each servo on the same curve ideally the blue curve of servo 1 Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 A brief history of head geometry O 8 3 4 A mechanically perfect setup Such a mechanically perfect setup looks surprisingly easy in the first place e Each servo horn has an angle of 90 or 0 in relation to its servo case e Each servo linkage has the exact same and perfect length e Each blade linkage has the exact same and perfect length for correct blade track ing On such a setup each servo uses the same curve in the graph and therefore no deflection of the swash plate occurs on collective pitch cyclic pitch and any other input combination No adjustments of the servo mid points are necessary The delta between full positive and full negative transmitter pitch still needs to be com pensated electronically by changing the servo end points servo throw But the value is the same for all three servos and therefore all three still use the same curve Even the setup procedure for a mechanically per
19. e Soko Gauge reads 0 0 If you have to highly adjust the midpoint try to lengthen or shorten the linkage from the servo to the swash plate instead A mechanical adjustment is always a bet ter choice than an electronic one age 7 Change the servo trim or linkage length for the second servo until the Soko Gauge reads 0 0 Download the latest instructions WwWww soko heli tools com INSTRUCTIONS v2 5 Setup of swash plate zero pitch and blade tracking S 8 Turn the rotor head to align the Soko Kit linkage with the third and last servo linkage 9 Change the servo trim or linkage length for the third servo until the Soko Gauge reads 0 0 10 Repeat steps 4 to 9 until no adjustment is needed anymore and the Soko Gauge reads absolute 0 0 during one whole turn of the rotor head 11 The swash plate is now perpendicular to the main shaft 12 Mount the Soko Kit in the other second blade grip 13 Ensure the Soko Gauge reads absolute 0 0 If it doesnt adjust the linkage from the second blade grip to the swash plate MECHANICALLY until it reads 0 0 14 Both blade grips now have 0 pitch and your swash plate is 90 to the main shaft at zero pitch Your blades are tracked as well if your blades are equal same weight and same centre of gravity Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 Setup of swash plate zero pitch and blade tracking O g gt 9 gt g g
20. e grips 5 Before the helicopter skids lose contact to the surface observe if the tail moves towards the surface or away Just watch the distance of the tip of the tail fin 6 Place the helicopter back on the surface and adjust the centre of gravity ac cordingly The common way to do that is to slightly change the position of the main battery If the tail moved towards the surface the helicopter is tail heavy Move the battery more to the front If the tail moved away from the surface the helicopter is nose heavy Move the battery more to the back 7 Repeat the step 4 to 6 until the skids and tail fin are starting to move at the same time Don t forget to mark the final position of the battery 8 The centre of gravity is now adjusted FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUVvVMuOs LSVA GUVMUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAUOA LSVA GUYVMUOA LSVA GUVMUOSI LSVA GUVMUOA LSVA GUVMUOA LSVS Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Setup of centre of gravity CoG 6 6 2 Rechecking the CoG There is an easy way to check the centre of gravity in any situation and anywhere without the need of a tool This way is not new but worth mentioning in this section for sure 1 Assemble everything batteries canopy etc ready to fly 2 Grab the helicopter on the rotor head and lift it into a vertical posit
21. e through the origin of the graph Changing the servo linkage length or the blade linkage length does not significantly change the shape of the curve If just one linkage length is changed the curve moves out of centre If you lengthen one and shorten the other accordingly the curve stays the same One way to improve the shape is to change the servo horn length An example for the Goblin 700 HPS is shown in the following graph 45 Goblin 700 HPS v tote c 40 a i e 5 18mm servo horn z 17mm servo horn g main blade pitch delta pos neg on same servo angle ee It doesnt improve much though Keep also in mind when shortening the servo horn length the servo position itself needs to change as well to keep the ideal head geometry valid For the Warp 360 the delta is too big to get a good compensation with shortening the servo horn We identified the angle of the blade linkage as the reason for the high delta The blade linkage on the Warp 360 isnt as vertical as on the bigger sized helicopters When we increase the distance between the ball on the swash plate swash distance and main shaft by 4mm and shorten the servo horn as well we get close to the curve of the other helicopters Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 A brief history of head geometry g 40 KA original and 15mm servo horn 4mm swash distance and 15mm servo horn servo horn angle
22. eans it doesnt matter if your maximum tail pitch is 30 3 or 30 5 or even 29 or 31 In reverse it doesnt matter if the setup method calculates 30 but due to reduced ac curacy in the process it really is 29 Moreover most of the tail mechanics even on a SAB Goblin are designed with a play in their tail i e blade grips which makes an accurate setup impossible To setup the maximum tail pitch we developed the following setup procedure 7 2 2 Setup the maximum tail pitch The following steps illustrate an easy way to calculate the tail pitch of a certain tail throw or setup the tail throw to get a certain tail pitch of course for all helicopters of all sizes and all brands 1 Fold the tail blades to the same side Download the latest instructions WwWww soko heli tools com INSTRUCTIONS v2 5 Setup of tail pitch S 2 Ensure you have zero pitch by pressing two flat objects on both sides of the blades left picture and scanning their alignment right picture 3 Take a ruler or any other object with a right angle 4 Align one edge of the right angle green line along the tail rotor shaft red line at tail screw height and the corner of the right angle on the middle of the tail blade screw green arrow Fold the tail blade so its tip corner blue arrow is on the other perpendicular edge blue line of the ruler oct AE Ost OW aa May 09 DE x Uf 4 Z pA 4 4 2 wh oe yi n 4 4 4
23. eds and possibilities Everyone knows the one and only thing you have to setup on the tail you have to tell the FBL system the mechanical end points of the tail Some FBL systems need to know the zero pitch position as well Other than the main rotor pitch the tail rotor pitch has no swash plate just one servo and a quite simple mechanism with no way to adjust anything So there is neither a need to measure the tail pitch of each blade separately nor a need to know when the tail pitch has an angle of i e 2 3 Getting the zero pitch position is quite easy to do by folding both blades on one side and moving the tail slider until both blades are in line You see that so far measuring or even using a tool is unnecessary and wont give you a bet ter setup or even a better flying helicopter There is one thing though that some of you might want to setup on the tail which includes measuring the tail pitch It has to do with the maximum tail pitch and tells the FBL system not the maximum mechanical end points of the tail but a tail slider position that is less than the mechanical maximum In other words Not allowing the tail to go over a certain pitch angle maximum pitch an gle even if mechanically a higher angle would be possible The reason to this is to prevent the tail from stalling to get stalling tail blades A lot of pilots dont know what this means which is OK especially if you are a beginner intermedi ate pilot Wikipedia desc
24. elation between servo horn angle and main blade pitch when the servo linkage is just 1mm too long The green curve represents a servo linkage that is 1 5mm too short Remember the servo horn angle is linear related to the transmitter pitch In other words the chart also represents the relation between transmitter pitch and main blade pitch You see just 1 5mm of linkage length difference leads to 2 5 difference in main blade pitch Or the other way around You need to get the servo horn 5 out of the neutral position to get 0 main blade pitch The three different servo geometries in the graph lead to a tilted swash plate at any trans mitter pitch value including 0 transmitter pitch Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 A brief history of head geometry g From servo horn angle to servo throw angle With the setup procedure in section 6 2 on page 22 you compensate these errors by changing the servo mid points What this does is still talking about the green curve in the last graph tell the FBL system to put the servo 5 off neutral position when it receives 0 transmitter pitch But this change of the servo mid point also shifts the servo end points Here is an example Let s say with 0 transmitter pitch the servo horn angle is 0 with full positive transmitter pitch at 25 and with full negative transmitter pitch at 25 servo horn angle By changing the servo mid p
25. equals 0 transmitter pitch e the same positive and negative full main blade pitch despite of deflections due to the head design geometry e a perpendicular swash plate at full negative and positive transmitter pitch and everywhere between The most surprising point though is that all this is true for servos which are nowhere near perfect 90 servo horns Just servo 1 is still at this position Servo 2 is 3 19 down and servo 3 is 4 79 up That s a difference of 8 but the swash plate movement is perfect This fact is not an excuse to get lazy about the initial setup of the servo horns It is still important But the 90 servo horns are not as important anymore once the setup process is finished It is much more important to get the linkage lengths right But this is not the end All the above deals just with an input of collective transmitter pitch without taking cyclic pitch into account In addition there is one other minor flaw A mechanical setup error imperfect linkage lengths is compensated with electronics change of servo mid and end points Cyclic pitch In all graphs so far the y axis end points are 30 and 30 main blade pitch and the maxi mum values on the x axis for the servo angle are 45 and 45 The reason for that is when full transmitter pitch and full aileron roll and full elevator nick are applied the servo horns rotate up to 45 or even more Looking at the graph on page 50 the delta of m
26. er the helicopter 9 Turn the head 90 so the main blade axis red is in a line parallel with the longitudinal axis of the helicopter blue and the ball red arrow faces to the right 10 Note the absolute angle the Soko Gauge displays In our example it is 67 8 FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUvMuOs LSV4 GUVMUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMUOA LSVA GUVMUOA LSVS Download the latest instructions WwWww soko heli tools com SEK INSTRUCTIONS v2 5 Absolute vertical alignment of main rotor shaft z 11 If the angle of step 10 greater than the target angle you need to raise the right side of the helicopter If the angle less than the target angle as it is in our ex ample 67 8 lt 68 2 you need to raise the left side of the helicopter Use sheets of paper under the skids green hatched area or chassis until you read the target angle 12 Finally turn the rotor head slowly yellow arrow one full turn The display should ideally read the target angle at any position you stop the rotation 13 The main rotor shaft is now in vertical level Depending on the slack in your helicopter the calculation in step 7 can give a result with two decimal places The same can happen if the values of step 4 and step 6 are on the cusp of the next value Use common sense in such situations The final
27. est instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 The Soko Kit g 4 2 The Soko Kit 4 2 1 The components of the Soko Kit The parts the Soko Kit consists of are as follows 1x Soko Helical lx Soko Gauge 2x AAA battery 3x M3x6mm screw Ix M2x6mm screw Ix M1 6x6mm screw Lx M2 washer 2x M3 washer lx Special mounting velcro lx Zipper bag 4 2 2 How to easily store the Soko Kit 7 z 7 Wouldnt it be nice if you dont have to care p about damaging or breaking the Soko Kitwhen Z 6 you dont use it Whereever you may store it z b p The Soko Kit is a tool in the end and tools like A g to be stored in the garage or in a toolbox Q 7 p 1 The most compact and secure way to pack the Soko Kit is to place the Soko n g Gauge with the display on the Soko Helical Q 2 Put the boss at the bottom of the Soko Helical through the hole in the special mounting velcro p gt lt 3 Wrap the velcro around the thickest part 4 of Soko Helical and over the Soko Gauge O z 4 Clamp the wrapped Soko Kit between Q thumb and forefinger while closing the 5 E velcro with the other hand P 7 A 5 Put this compact package into the zipper J ce bag along with the screw bag 2 gt 5 6 Done S T T D gt O A Download the latest instructions Www SsSoko heli tools com Ts INSTRUCTIONS v2 5 The Soko Kit SOKO 4
28. ews SOKO 5 3 Using the special mounting velcro instead of screws In almost all positions the Soko Gauge is screwed to the Soko Helical This is the preferred and most secure way to connect them However some of you may not like to fiddle with the screws Moreover if you like to setup different sized helicopters you will have to unscrew the Soko Gauge from the Soko Helical and screw it again So if youd like to go ahead and use the special mounting velcro instead of the screws to secure the Soko Gauge on the Soko Helical throughout the instructions Just skip the screwing steps but make sure to put the boss at the bottom of the Soko Helical through the hole in the velcro and mount the Soko Gauge as shown in the pictures Hint If the instructions tell you to use the velcro it is not an option to use the screws The use of the velcro is mandatory for that procedure 5 3 1 Do you use your own gauge The special mounting velcro is optimized for the Soko Gauge With some other gauges the velcro may easily slip off the gauge In this case just use some adhesive velcro Stick the adhesive velcro on top of the gauge Now put the gauge in position on the Soko Helical and wrap the special mounting velcro around it Carefully remove the special mounting velcro again You end up with one part of the adhesive velcro sticking on the gauge and the other part sticking on the special mounting velcro Press on the both adhesive velcros to make sure t
29. faces to the front In other words the Soko Gauge axis green is perpendicular yellow to the longitudinal axis blue of the helicopter 3 Now setup the desired aileron pitch The Soko Gauge displays the current pitch angle 4 To measure the nick elevator angle rotate the main rotor so that the Soko Gauge display faces to the side The Soko Gauge axis green is parallel to the longitudinal axis blue of the helicopter In addition the main rotor axis red is perpendicular yellow to them 5 Now setup the desired nick pitch The Soko Gauge displays the current pitch angle Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Setup of cyclic pitch g 9 gt g gt g gt g S N 6 gt lt gt g gt Q g gt gt q N Q Q 2 2 Q 2 Q Q 2 2 Q 2 Q Q 2 2 9 gt g gt g g gt The absolute values of the two Make sure your pitch end points on the transmitter are the _sides of one axis elevator nick same i e 100 for positive and negative pitch and dual rate or aileron roll are far off is disabled if your transmitter supports this feature i e 9 5 and 8 4 The values per axis are close A mechanical cause or setup error is unlikely in such a situa enough but the two axis are far tion Especially if all other values during the setup were OK off Did you change some values in the FBL unit i e 9 5 and 9 4 for elevator Consult yo
30. fect setup is simple e Setup the servo horns according to section 7 1 on page 35 e Follow the setup procedures in section 6 on page 18 e Instead of changing the servo mid points adjust the servo linkage lengths in the steps of setup procedure in section 6 2 on page 22 In theory this works perfectly but in real life it doesn t Real life problems for a mechanically perfect setup There are a couple of things which makes such a mechanically perfect setup time consum ing e Each servo needs to be mounted in such a way that the root of each servo horn is at the exact same vertical position The graphs above show how a difference of just 1mm in linkage length leads to different main blade pitches A vertical mounting position difference of the servos of Imm is the same as a linkage length error of 1mm e Each servo linkage has to be the same length down to a fraction of a millimetre e Not all helicopters use the same mounting position for all 3 servos On a lot of helicopters the back servo is mounted differently than the two front servos This leads to different servo linkage lengths and makes it very difficult to determine the perfect lengths for the servo linkages All points above can be solved by enough time try and error and a lot of patience But there is one additional point which makes such a setup impossible e The current linkages do not allow minor changes of their length The vast majority of the servo linkages and blade lin
31. ge because Just open the connection of the linkage to the swash plate _it is bolted to the blade grip i e Flip the linkage upwards and turn the Soko Kit counter clock _as on most DFC style heads wise until the upper part of the linkage rests on the side of the rotor head FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUuvMuOs LSVA GUVMAOA LSVA GUVMUOA LSVA GUVMAUOSA LSVA GUVMAOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAOA LSVA GUVMUOA LSVS Download the latest instructions WwWww soko heli tools com SEK INSTRUCTIONS v2 5 Position 2 as main blade g 5 2 Position 2 as main blade 1 Fasten the Soko Helical with the loose mounted Soko Gauge in one of the main blade grips by using one of the main blade screws 2 Ensure that the Soko Helical alignment orange follows the main blade axis red 3 Now move the Soko Gauge as close as possible to the blade grip red arrows ensure that the Soko Gauge axis green is perpendicular yellow to the main blade axis red and screw it tight FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUuvMudOs LSV4 GUVMUOA LSVA GUVMUOA LSVA GUVMUOA LSVA GUVMAOA LSVA GUVMUOA LSVA GUVMAOSA LSVA GCUVMUOA LSVA GUVMUOA LSVS Download the latest instructions Www SsSoko heli tools com Ts INSTRUCTIONS v2 5 Using the special mounting velcro instead of scr
32. goal is reading the same angle in step 12 It is OK if you read an angle which is slightly off from the calculated target angle As long as it is the same value as close as possible If your FBL system has a self level feature it s a good idea to recalibrate the sensors Finally if you remove the Soko Kit from its position be careful to not alter the alignment of the heli on the surface FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUvMuOs LSV4 GUVMUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMUOA LSVA GUVMUOA LSVS Download the latest instructions Www SsSoko heli tools com TE INSTRUCTIONS v2 5 Absolute vertical alignment of main rotor shaft SOKO Q gt g gt g g S D 9 gt g D g gt g g D gt g y Q 2 2 Q Q 2 Q Q 2 2 Q 2 Q Q 2 2 g D g 2 g X g gt If you have to use a lot of paper try to push gently on the heli copter to stabilize the skids on the paper Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Setup of swash plate zero pitch and blade tracking g 6 2 Setup of swash plate zero pitch and blade tracking Ihe main rotor shaft must be in an absolute vertical position section 6 1 on page 18 and the Soko Kit must be mounted in as main blade see section 5 2 on page 16 IMPORTANT SAFETY INFORMATION Ensure at all times that the main roto
33. hey stick well onto the gauge and the special mounting velcro Now the special mounting velcro wont slip off your gauge anymore FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUvMuOs LSV4A GUVMUOA LSVA GUVMUYOA LSVA GUVMUOSA LSVA GUVMAOA LSVA GUYVMUOA LSVA GUVMUOSA LSVA GUVMUOA LSVA GUVMUOA LSVS Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Absolute vertical alignment of main rotor shaft z 6 Setup procedures 6 1 Absolute vertical alignment of main rotor shaft To bring the main rotor shaft of your helicopter in an absolute vertical position the Soko Kit must be mounted in Position 1 see section 5 1 on page 13 If your skids are too flexible reinforce them for the setup procedure In most cases two strings or a rubber band one at the front and one at the back to pull both skids together are enough In addition you can put a piece of wood or metal between both skids 1 Place your heli on a stable and even surface 2 Be sure that you can read the display of the Soko Gauge at every position of the rotor head during a full turn Use a workbench in the middle of the room or place the heli on the floor 3 Turn the head so the main blade axis red is perpendicular yellow to the longitudinal axis of the helicopter blue In addition the ball of the blade grip with the Soko Kit red arrow needs to face backwards
34. hs need to be setup as de scribed in the assembly manual Next ensure the FBL flybarless system and transmitter are set up All servos need to move in the right direction when moving the transmitter sticks IMPORTANT Do not overtighten the screws that mount the Soko Gauge on the Soko Helical Stop to tighten the screws when the Soko Gauge does not move anymore Overtightening may result in bending the contact surface which leads to inaccurate measurements or even damage of the Soko Kit 4 4 Helicopter with a flybar Setup of your flybar helicopter with the Soko Kit is as easy as the setup of a flybarless heli copter Just follow the instructions in this document But each time you do a measurement make sure your flybar is perpendicular to the main shaft That is all you have to do For most flybar helicopters scanning that it is the right angle is enough Hint This additional step has nothing to with the Soko Kit itself It is a peculiarity of a flybar head itself Therefore it is necessary for every measurement on the blade grips with any tool available on the market 4 4 1 Testing the sensitivity of a flybar input To test how accurate you have to be just mount the Soko Kit in Position 2 section 5 2 on page 16 and make sure the servos dont move i e by powering them up Now bring the flybar in at a right angle to the main shaft and read the Soko Gauge display Slowly move the flybar out of the right angle position Once
35. ing the Soko Kit can do for you have a look in here Finally our brief history of head geometry in the appendix is always worth a read 2 Soko Heli Toolbox mobile app Our FREE Soko Heli Toolbox mobile application gives you an even faster setup experi ence with its easy step by step guide through the whole setup process Toolbox The optional Virtual Main Shaft feature simplifies and speeds up the setup even more by eliminating the need for a vertical aligned main shaft by calculating its tilt in 3D space For all the latest and greatest about the Soko Heli Toolbox app visit the store sites below ANDROID APP ON P gt Google play https play google com store apps details id com sokohelitools apps android toolbox f Download on the 3 App Store https itunes apple com app soko heli toolbox id947314316 Download the latest instructions Www SsSoko heli tools com Ts INSTRUCTIONS v2 5 Eager pilot SOKO 3 What kind of hobbyist are you We are the first setup tool company which attempts the balancing act to suit both ex tremes of helicopter pilots and anyone between of course 3 1 Beginner If you are a beginner or even assembling your first helicopter we highly recommend read ing the whole document through before beginning even if you are an eager pilot 3 2 Thorough hobbyist You are a thorough or even meticulous hobbyist who likes to spend a lot of time to setup the helicopter The assembling p
36. ion 3 Turn the tail to your right with your other hand let go again and observe if the tail is moving 4 Turn the tail to your left with your other hand let go again and observe if the tail is moving FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUVvVMuOs LSVA GUVMUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAUOA LSVA GUVMUOA LSVA GUVMUOSI LSVA GUVMUOA LSVA GUVMUOA LSVS Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 Setup of centre of gravity CoG O 5 Ifthe tail drops in step 3 or 4 the helicopter is tail heavy Move the battery more to the front If the tail raises in step 3 or 4 the helicopter is nose heavy Move the battery more to the back 6 Ifthe tail stays in position in any orientation the CoG is perfect FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUvVMuOs LSVA GUVMUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAUOA LSVA GUVMUOA LSVA QAVMYAOJ LSV3 GUVMUOA LSVA GUVMUOA LSVS Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Setup of centre of gravity CoG g 6 6 3 A third way to check the CoG To setup the centre of gravity the Soko Kit must be mounted according to section 5 1 on page 13 and you must know the final target angle of the setup procedure of section 6 1 on page 18 Absolute vertical alignment
37. kages on the market have two clock wise threads on the linkage rod This means a full turn of the ball link is needed to change the length of the linkage and to be able to put it on the ball again So the possible length changes are too coarse Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 A brief history of head geometry g We just know of two helicopter kits KDS Agile 5 5 and Kasama Srimok FBL which come with all turnbuckle linkages Upgrades to clockwise counter clockwise servo linkages and blade linkages turnbuckle linkages are available for a few helicopters A mechanically perfect setup is only possible on such a helicopter but still a little bit more time consuming 8 3 5 Conclusion Ihe main thing to take from this whole section is to make as many adjustments as possible mechanically linkage lengths and as few as possible electronically servo points adjust ments Until all linkages shipped with the helicopter kits are turnbuckle style we cant get rid of some servo point adjustments in the FBL system Till then it is better to spend more time to optimizing the linkage lengths than to getting your servo horns perfectly setup Because you have to adjust the servo mid points after wards anyways which alters the perfect 90 servo horn Download the latest instructions Www SsSoko heli tools com TE INSTRUCTIONS v2 5 With head stopper disc option SOKO 8 4 With head stoppe
38. more information or you dont find the answer you are a for please don t hesitate to contact us We are happy to help LOOOTO FAQ amp troubleshooting Question Problem Answer Solution _ like to use the Soko Kit a lot but Yes kinda dislike the paper method With a few simple items you can build yourself a levelling table Is there an alternative There are a lot of samples on the internet and in forums Two very simple but effective ones are by and did a great build video of a more sophisticated version _ The opening of the blade grip of Use suited washers to mount the Soko Kit in the blade grip the helicopter is an odd size and They were probably delivered with the helicopter kit or the it seems no corner of the Soko main blades There is also some flex in the blade grip itself Helical fits which you can utilize with the blade screw when mounting the Soko Kit Do I have to put the main shaft No into vertical position each time Just use the Soko Kit as any other pitch gauge want to measure the pitch After your first full setup with the Soko Kit you do not need to bring the main shaft into vertical position if you didn t change the head geometry i e rebuild after a crash or the servo points in the FBL unit Just mount the Soko Kit in Position 2 and rotate the head to measure the desired pitch Apply 0 pitch on your transmitter and or in the software of your FBL unit Ignore the absolute
39. n blade axis red line 2 Mount the Soko Gauge on the Soko Helical using the special mounting velcro Be sure to put the boss at the bottom of the Soko Helical through the hole in the velcro It is important to wrap the velcro around the parallel edges orange Ensure that the Soko Gauge axis green is perpendicular yellow to the main blade axis red 3 Open the linkage red arrow which connects the blade grip with the mounted Soko Kit to the swash plate FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUuvMudOs LSV4 GUVMUOA LSVA GUVMUOA LSVA GUVMUOA LSVA GUVMAOA LSVA GUVMUOA LSVA GUVMAOSA LSVA GCUVMUOA LSVA GUVMUOA LSVS Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 Position 1 O 4 Turn the Soko Kit counter clockwise until the ball of the blade grip rests on the side of the rotor head It is important that this resting position is stable and the ball does not change its position the blade grip itself does not rotate during a full turn of the head 5 The weight of the Soko Kit is enough to keep this stable position of the blade grip You can use a cable tie to secure the ball to the rotor head but usually it is not necessary Q N Q gt S 6o gt gt co gt g N g g gt K gt co gt co N g N Q Q Q Q 2 Q Q Q 2 Q 2 Q Q Q 2 Q co gt Q g N gt L can t open the linka
40. n this document Instead of an algebraic sign plus minus the symbol on the left is used which imitates a spirit level water level bubble We call them inside and outside values The first picture shows an outside 12 5 and the one at the end of the page an inside 0 3 Ihe red part measures the angle relative to the last zero point The zero point is set by pressing shortly on the ON ZERO button The HOLD button freezes the display Press the ON ZERO button for more than 2 seconds to turn the Soko Gauge on or off Hint To retract the display push it up into the hinge while rotating O P www Soko Se Heli Tools com FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD QGUAVMJOJ LSV3 GYUVMUYOA LSVA GUVMUOA LSVA GUVMAOSA LSVA GUVMUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMUOA LSVA GUVMUOA LSVA Download the latest instructions Www Soko heli tools com Ts INSTRUCTIONS v2 5 Helicopter with a flybar SOKO 4 3 Preparations and hints IMPORTANT SAFETY INFORMATION Ensure at all times that the main rotor motor does not spool up Disconnect the wires from the ESC to the motor To achieve optimal results use a stable and even surface In addition ensure stable posi tioning of the helicopter on the surface If your skids are too flexible dismount or rein force them for the setup procedure The helicopter needs to be fully assembled and all linkage lengt
41. nd jog your memory after you ve done a couple of setups in re servo horns Q section 5 1 mounting horns OM servo mid points DON Ee finish assembly of helicopter mountin re g determine fitting holes on Soko Helical position 1 section 3 1 mount Soko Gauge on Soko Helical mount Soko Kit in blade grip drop blade grip ball voile lace on stable surface main shaft a section 4 1 determine target angle gradually tilt helicopter until target angle is read at all positions mounting position 2 connect blade grip ball section 3 2 li swash plate zero pitch blade tracking adjust mid points and or linkage lengths section 4 2 until 0 0 is read at all positions servo mid point setup in FBL system adjust other blade grip collective pitch collective pitch setup in FBL system section 4 3 Soko Kit facing to the front adjust pitch until desired angle is read swash plate pitch consistency section 4 4 servo end point setup in FBL system adjust end points until target pitch is read at all positions cyclic pitch cyclic pitch setup in FBL system section 4 5 sda z d Soko Kit facing to the front adjust aileron roll pitch Soko Kit facing to the right adjust elevator nick pitch centre of assemble ready to fly gravity section 4 6 slowly lift helicopter skids and tail move at same time if CoG is correct the helicopter head and its parameter are ready for maiden flight Download the lat
42. of head geometry O On a flybarless rotor head a change of the servo horn angles leads directly to a change in the main blade pitch There are no other factors involved i e like a flybar mixing e The servo horn is connected to the servo linkage e The servo linkage is connected to the swash plate e The swash plate is connected to the blade linkage e The blade linkage is connected to the main blade grip The ideal head geometry Let s start by examining just one servo and with the head positioned like this A rotation of the servo horn causes a direct change of the blade pitch The way the servo horn angle and the main blade pitch are related depends on the helicopter and its head geometry Some factors are unalterable for us i e the distance of the main blade grip horn or the swash plate dimensions and some can be changed i e the lengths of the linkages An ideal head of a helicopter at 0 transmitter pitch has the following attributes e 90 between main shaft and the servo horn e 90 between the servo horn and the servo linkage e 90 between the servo linkage and the swash plate plane e 90 between swash plate plane and main shaft e the correct blade linkage length to get 0 blade pitch The following graph shows the relationship between the servo horn angle and the main blade pitch for different helicopters with ideal heads when applying transmitter pitch Download the latest instructions WwWww soko heli
43. oint value in the FBL system the servo horn moves to an angle of 5 when 0 transmitter pitch is applied In addition the servo horn angle is 30 for full positive and 20 for full negative transmitter pitch The servo throw angle though is still the same The servo horn moves 25 for full positive and 25 for full negative transmitter pitch So the servo throw angle is the angle or distance the servo horn moves in relation to its mid point Adjusted servo mid points When adjusting the servo mid points the green curve shifts to the left and the red shifts to the right so all three curves pass through the origin of the graph Goblin 700 HPS 30 20 10 ZF servo throw angle 45 35 25 15 5 5 15 25 35 45 10 20 Servo 1 perfect linkage length 0 Servo 2 servo linkage 1mm off 3 19 lt O o e B Q Servo 3 servo linkage 1 5mm off 4 79 E 30 Download the latest instructions Www Ssoko heli tools com INSTRUCTIONS v2 5 A brief history of head geometry O The legend of each curve states the exact angle the servo horn is off its optimum mid point to compensate for the wrong linkage length Servo 1 is 0 off servo 2 is 3 19 and servo 3 4 79 due to the change of the mid points of servo 2 and 3 Analysing the servo throw graph What does this mean for our helicopter setup Below is the same graph zoomed to just 15 main blade pitch Goblin 700 H
44. onal setup procedures The following setup procedures are separated from the above because they are not needed in all situations Nevertheless depending on your helicopter your flying skills your com ponents etc you might want to use them 7 1 Setup of servo horns Once you are ready to setup with the Soko Kit your servo horn setup is already done and most of you set it up the way as described below Its mainly included here to aid the expla nations in section 8 3 on page 44 The easiest way to setup the servo horn is actually before you mount them into the frame In general it s a good idea to setup and test the whole electronic FBL system servos ESC motor etc before you install it in the helicopter 1 Wire your receiver satellite s FBL system and servos and bind it to your transmitter Look into your FBL system manual for the proper order to do this Most FBL systems require some basic setup before you connect anything to it 2 With wiring the cyclic servos to your FBL system you choose their spot in the helicopter Make sure you know afterwards which servo has to go to which position 3 Check the manual of your helicopter to determine which way each servo is mounted in the helicopter This includes e the orientation of the servo case vertical or horizontal e the position of the servo horn mounting point i e for a vertical servo if the mounting point is in the upper or lower part of the servo case e the direction
45. r disc option We recommend to use the Without head stopper disc versions of the setup procedure as the head stopper disc surface of the head is not perfectly perpenticular on most helis We keep the steps here in the appendix for your reference though 8 4 1 Position 1 There is the option to screw the Soko Gauge tight on the Soko Helical before you mount it on the rotor head See step 7 for more details Another option is to use the special mount ing velcro instead of the screws see section 5 3 on page 17 1 Remove both main blades 2 Remove the head stopper disc 3 Determine the corner of the Soko Helical which fits best in the main blade grips and remember which two holes are closest to the grip for our 550 size helicopter the purple holes are the right one 4 Place the Soko Gauge upside down on the table Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 With head stopper disc option g 5 Place the Soko Helical upside down on the Soko Gauge so you can see the nuts in the Soko Gauge through the memorized holes of the Soko Helical Loosely screw both together using two of the three M3 screws supplied Hint If you use the velcro instead of the screws be sure to put the boss at the bottom of the Soko Helical through the velcro before you screw the Soko Hel ical onto the rotor head in the next step 6 Depending on your helicopter s size and brand choose the fitting screw
46. r motor does not spool up Disconnect the wires from the ESC to the motor 1 Power on your transmitter and power on the FBL system and the servos Wait until the FBL system has initialized and is connected to the transmitter 2 Activate the servo midpoint servo trim setup on your FBL system Have a look in the user manual if necessary Be aware for some FBL systems the pitch value of the transmitter is important as well to centre the servos 3 Turn the rotor head until the Soko Kit faces to the front right back and left and read the absolute angle at each of the four positions The average value of all four should be around 0 0 i e 1 2 0 7 0 9 and 0 8 If all val ues are below or above 0 0 i e 1 2 1 5 0 9 and 1 0 your linkage from the blade grip to the swash plate is too long or too short Adjust the length accordingly to get an average value around 0 0 4 Turn the rotor head until the inner ball of the swash plate where the Soko Kit is mounted red arrow aligns with the outer ball of the first servo purple ar row In other words align the linkage of the blade grip with the Soko Kit with the linkage of the first servo Which servo is first does not matter We chose the front right servo looking in flight direction Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 Setup of swash plate zero pitch and blade tracking KO 5 Change the servo trim for the first servo until th
47. ribes it as a reduction in the lift coefficient generated by a foil as the angle of attack increases Without going into much detail the critical term in its definition is angle of attack The angle of attack is not the pitch angle of the tail which is called angle of incidence in our case although the angle of attack is a result of the angle of incidence in addition to other parameters To keep a long and quite technical story short The angle of incidence tail pitch your tail will stall is practically not possible to predict and not feasible to calculate Download the latest instructions www soko heli tools com s INSTRUCTIONS v2 5 Setup of tail pitch SOKO In a nutshell Even if you know all necessary parameters from your helicopter it highly depends on the manoeuvre you are flying at a particular moment in addition to the wind conditions on the flying day For example on the same day and the same flight your tail will start to stall at 25 pitch on one manoeuvre while on another manoeuvre the blades wont stall at 45 pitch keep in mind that we are talking about high speed 3D manoeuvres In conclusion there is not much a point in reducing the maximum tail travel and therefore the maximum tail pitch Provided that the tail mechanic itself has no issues on its maxi mum positions i e get stuck at the end points Even if you are keen to do it there is no need for accuracy here due to the physics involved This m
48. rocess is at least as important and fun as the flying itself We are sure we met your passion with Soko Kit and our highly detailed instructions The most important point during development of the Soko Kit was to achieve the highest ac curacy possible Each procedure and each step of our instructions was rigorously analysed to give unprecedented and accurate results We hope you enjoy reading each page of this instructions as we did writing it 3 3 Eager pilot You are a eager pilot who likes to finish the setup as fast as possible The primary goal is to be out and flying again But still with the best setup possible for the time you like to invest OK don t let us waste time here Just look for the FAST FORWARD colour coded sections like this one RED Read it ORANGE Should read it skim through GREEN Still have time Go for it The table of content gives an additional overview with the colour coded background Here is the summary and best reading order of the labelled sections 1 Ifyou havent read the printout yet which comes with the Soko Kit Section 4 2 3 on page 9 amp section 4 2 4 on page 10 Get to know the Soko Kit 2 Section 5 3 on page 17 Use the velcro instead of the screws for fast results 3 Section 4 1 on page 7 This flow chart is probably all you need 4 Section 5 starting on page 13 Fly over the two mounting positions 5 We reckon you already got the idea behind Soko Kit from our website and
49. rrow one full turn The display should read 0 0 at any position you stop the rotation 6 The main rotor shaft is now in vertical spirit level If your FBL system has a self level feature it s a good idea to recalibrate the sensors Finally if you remove the Soko Kit from its position at the head stopper disc be careful to not alter the alignment of the heli on the surface FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUvVMuOs LSV4A GUVMUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMUOA LSVA GUVMUOA LSVS Download the latest instructions WwWww soko heli tools com S INSTRUCTIONS v2 5 With head stopper disc option 8 4 3 Check the CoG To setup the centre of gravity the Soko Kit must be mounted as head stopper disc l Turn the rotor head so that the Soko Gauge green measures the nick angle of the helicopter and the main blade axis red is at right angles to the longitudi nal axis of the helicopter blue Now prevent the rotor head from rotating This is highly dependent on your brand and size of heli For example use a tape or cord to tie the tail gear to the main gear Assemble everything batteries canopy etc ready to fly Lift the helicopter by the two main blade grips Be sure the heli can nick as freely as possible Another and more accurate way to do this is to build a han dle out of s
50. sier and faster Use option 2 only when you are not able to fully turn the head in option 1 due to contact with other parts of the helicopter This can happen on small helicopters or low rotor heads Option 1 1 Mount the Soko as main blade see section 5 2 on page 16 2 Open the linkage red arrow which connects the blade grip with the mounted Soko Kit to the swash plate 3 Turn the Soko Kit counter clockwise until the ball of the blade grip rests on the side of the rotor head It is important that this resting position is stable and the ball does not change its position the blade grip itself does not rotate during a full turn of the head 4 The weight of the Soko Kit is enough to keep this stable position of the blade grip You can use a cable tie to secure the ball to the rotor head but usually it is not necessary FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD FAST FORWARD GUuvMudOs LSV4 GUVMYUOA LSVA GUVMUOA LSVA GUVMUOSA LSVA GUVMAOA LSVA GUVMUOA LSVA GUVMUAOSA LSVA GCUVMUAOA LSVA GUVMUOA LSVS Download the latest instructions WwWww soko heli tools com INSTRUCTIONS v2 5 Position 1 S Option 2 1 Loosely mount the Soko Helical in one of the main blade grips by using one of the main blade screws Turn the Soko Helical yellow arrow away from the blade grip horn red arrow so that the two edges of the Soko Helical orange are parallel to the mai
51. sit page 13 flat Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 With head stopper disc option z 8 4 2 Absolute vertical alignment of main rotor shaft In order to bring the main rotor shaft into an absolute vertical position spirit level the Soko Kit must be mounted as head stopper disc 1 Place your heli on a stable and even surface 2 Be sure that you can read the display of the Soko Gauge at every position of the rotor head during a full turn Use a workbench in the middle of the room or place the heli on the floor For the latter method flip up the display so you can read it from the top 3 Turn the head so that the Soko Gauge green is aligned with the longitudinal axis blue and measures the nick angle The target angle is an absolute angle of 0 0 One way to achieve small changes of the angle is to put sheets of paper red hatched area under one side of the skids or chassis until you read 0 0 we had to put it under the front of the helicopter to achieve 0 0 Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 With head stopper disc option KO 4 Turn the rotor head 90 and repeat the procedure for the roll axis Use sheets of paper under one side of the skids green hatched area or chassis until you read 0 0 we had to put it under the left side of the helicopter 5 Finally turn the rotor head slowly yellow a
52. t g g S D 9 gt lt gt g gt co g gt gt q gt Q Q 2 2 Q Q Q Q 2 Q Q 2 Q Q 2 9 Q gt g g N Q p gt This whole process doesn t Be sure you have disabled any third party unit between the seem to work at all Any changes FBL system and the servos i e DJI Wookong on the servo trim lead to an un defined movement or no move ment at all Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Setup of collective pitch g 6 3 Setup of collective pitch Ihe main rotor shaft must be in an absolute vertical position section 6 1 on page 18 and the Soko Kit must be mounted as main blade see section 5 2 on page 16 It is necessary that the swash plate level and 0 pitch see section 6 2 on page 22 are already adjusted The setup procedure of maximum pitch levels is highly dependent on your FBL system type For the right setup mode and how to adjust the angles see the manual of your FBL system The Soko Kit supports this setup by measuring the pitch angle 1 Activate the setup of the collective pitch angles in your FBL system 2 Turn the rotor head so that the display is facing to the front of the helicopter 3 Now setup the desired maximum negative and maximum positive pitch The Soko Gauge displays the current pitch angle g S gt S g gt g g S gt Q N lt gt Q 4 g g gt g D Q Q Q 2 2 2 2 Q 2 2 2 2 2 Q 2 2 g g
53. t g gt S 2 g gt g Make sure your pitch end points on the transmitter are the same i e 100 for positive and negative pitch and dual rate is disabled if your transmitter supports this feature INFO The points above ensure the same relative rotation an gle of the servos on full positive and full negative pitch Download the latest instructions Www SsSoko heli tools com ST INSTRUCTIONS v2 5 Setup of collective pitch SOKO As an option you can setup your swash plate at full pitch see section 6 4 on page 28 as well Download the latest instructions WwWww soko heli tools com SK INSTRUCTIONS v2 5 Setup of swash plate at full pitch and pitch consistency z 6 4 Setup of swash plate at full pitch and pitch consistency The main rotor shaft must be in an absolute vertical position section 6 1 on page 18 and the Soko Kit must be mounted as main blade see section 5 2 on page 16 It is necessary to adjust the swash plate level and 0 pitch see section 6 2 on page 22 as well as set up the collective pitch see section 6 3 on page 26 1 Activate the setup of the servo end points sometimes called servo travel or servo throw in your FBL system 2 Apply full positive pitch 3 Follow the steps 4 to 10 in section 6 2 on page 22 of the basic procedure with two alterations e Your target angle is the full positive pitch angle of section 6 3 on page 26 e Instead of adjusting the servo mid points
54. the displayed angle of the Soko Gauge changes you ve gone too far 4 4 2 Additional things you can do Depending on the type of your flybar head you can build yourself a structure which keeps the flybar in a stable position during the whole setup example by CPO Download the latest instructions www soko heli tools com 50K INSTRUCTIONS v2 5 Final notes on 4 5 Final notes About our helicopter We are using a 550 sized helicopter throughout this document It is equipped with a FBL flybarless head two main blades and a 120 3 point servo swash plate If your heli has another head type you need to customise some procedures accordingly Ensuring accuracy Every part of a RC helicopter complies with quality standards in production However slack in the assembled heli is unavoidable especially on the path from the servo to the main blades The Soko Kit displays the angle with a resolution of 0 1 However the slack in the assem bled helicopter may not allow for perfect accuracy every time Therefore closely follow the instructions below in order to get your helicopter as accurate as possible Download the latest instructions Www SsSoko heli tools com ST INSTRUCTIONS v2 5 Position 1 SOKO 5 Mounting positions To setup your helicopter the Soko Kit must be mounted in two positions Position 1 and Position 2 5 1 Position 1 The preferred way to mount the Soko Kit when your helicopter is option 1 It is ea
55. trings which attaches on the blade grips or hang it from the ceiling Read the absolute angle on the Soko Gauge The target is an angle of 0 0 Place the helicopter back on the surface and adjust the centre of gravity ac cording to the angle The common way to do that is to slightly change the position of the main battery Repeat the step 4 to 6 until the desired angle is achieved as close to 0 0 as possible Dont forget to mark the final position of the battery The centre of gravity is now adjusted Download the latest instructions Www SsSoko heli tools com
56. ur FBL unit manual for cyclic mixing settings and try nick and 11 3 and 11 5 for ai to change the appropriate values Download the latest instructions Www SsSoko heli tools com INSTRUCTIONS v2 5 Setup of centre of gravity CoG O 6 6 Setup of centre of gravity CoG We highly recommend adjusting the CoG as the last step of your setup process but before you lose the position of the vertical aligned main rotor shaft Just follow section 6 6 1 below The easiest way to re check your CoG with no vertical main shaft is section 6 6 2 If you are able to lift your helicopter in a stable way or you can hang it from the ceiling have a look at section 6 6 3 6 6 1 With vertical aligned main rotor shaft Ihe main rotor shaft must be in an absolute vertical position section 6 1 on page 18 and the Soko Kit doesnt need to be mounted anymore 1 Turn the rotor head so the main blade axis red is at right angles yellow to the longitudinal axis of the helicopter blue 2 Now prevent the rotor head from rotating This is highly dependent on your brand and size of heli For example use a tape or cord to tie the tail gear to the main gear 3 Assemble everything batteries canopy etc ready to fly 4 Slowly lift the helicopter vertically by the two main blade grips Be sure the heli can nick as freely as possible Another and more accurate way to do this is to build a handle out of strings which attaches on the blad
57. you are adjusting the upper servo end points positive travel or positive throw 4 Once you read the same positive collective pitch at any rotation position of the head apply full negative pitch 5 Follow the steps 4 to 10 in section 6 2 on page 22 of the basic procedure with two alterations e Your target angle is the full negative pitch angle of section 6 3 on page 26 e Instead of adjusting the servo mid points you are adjusting the lower servo end points negative travel or negative throw 6 Once you read the same negative collective pitch at any rotation position of the head you are done 7 Your swash plate is now 90 to the main shaft at full positive and full negative collective pitch Download the latest instructions Www SsSoko heli tools com ST INSTRUCTIONS v2 5 Setup of cyclic pitch SOKO 6 5 Setup of cyclic pitch The main rotor shaft must be in an absolute vertical position section 6 1 on page 18 and the Soko Kit must be mounted as main blade see section 5 2 on page 16 It is necessary that the swash plate level and 0 pitch see section 6 2 on page 22 are already adjusted This setup procedure is highly FBL system dependent as well See your FBL system manu al for details The Soko Kit supports this setup by measuring the pitch angle 1 Activate the setup of the cyclic pitch angles in your FBL system 2 To read the aileron roll angle rotate the main rotor red so that the Soko Gauge display
Download Pdf Manuals
Related Search