32” Crack Yak-55
Contents
1. 46 DD OU C H 46 S 1 P 49 154 4 1 6 E EOI d M cmm 49 49 i 49 M 49 Iv 49 UA O E O 49 49 O eacaurnees 49 NOTES amp SU SHEETS ieee eer cr rr EMEN EMEN 50 HPSAND TRI E accu eau 51 Rev 2012 11 04 v004a 2 TWISTED HOBBYS Website www twistedhobbys com email sales twistedhobbys com Thank you for your purchasing a Twisted Hobbys model Please read through the entire manual before beginning to build this model If you have any questions please contact us at the above indicated email address VW 6 4 This R C Aircraft 15 not a toy Read and understand the entire manual before assembly If misused it can cause serious bodily harm and property damage Fly only in open areas and AMA Academy of Model Aeronautics approved flying sites Do not over look the warnings and instructions enclosed or those provided by other manufactures products If you are not an experienced pilot and airplane modeler you must use the help of an experienced2. guides and fill it with glue Rev 2012 11 04 v004a 31 Install the first guide push it into place not all the way down to the foam and kick it while holding it in place Continue with each subsequent pushrod guide Be very careful not to get any drops of CA onto the pushrods Rev 2012 11 04 v004a 34 Now assemble elevator push rod guide assembly just as you did with the rudder Time to install the Servos hardware package for the servo and scuff up the top side of it Note the stock arms will give 40 45 degrees of throw Extension is only needed if more throw 1s desired Rev 2012 11 04 v004a 33 Rev 2012 11 04 v004a Put a dab of thin on servo arm Now find and remove the two small ply oval shaped ply servo arm extenders that come in the hardware kit Note you must attach to the top side of the servo arm also make sure you do not add too much glue since the Adjustable End Link will need to spin freely Servo Arm Extension Kick it and let it dry completely 34 After it 15 dry wrap 1t with thread and we hit with kicker Completed Assembly To install the Adjustable links insert the block thru the horn hole and than with the concaved side facing in press the keeper washer onto shaft Remember that the Link must spin freely so do not press the keeper on too tigh This procedure applies to Aileron horns shown to the
3. Diff Servo Arm 12x Rod guides 1x Landing Gear Frame Brace 2x Landing Gear Wheel Pants Guides 2x Landing Gear Axle Angle Brace 0 Ax Landing Gear Washers Perfect choice for building and repairing your 4x Wing Spar Braces Twisted Hobbys EPP planes This is the only adhesive you will ever need Welder virtually bonds anything to anything Clear heavy duty flexible and water proof when dry Use indoors or out 1 1 02 tube Note many of these optional parts shown or similar items may be available from the Twisted Hobbys web store Rev 2012 11 04 v004a 6 4345 TOOLS Tape Measure and e Lighter e Small drill bits Welders Glue e Hobby Knife w new Blade Needle Nose Pliers Wire Cutters Low Temp Hot Glue Gun Course Sand Paper Scissors e Small Phillips Screw Driver and Activator Approx 18 string thread Rev 2012 11 04 v004a 7 CONSTRUCTION METHODS Building surface should be at least 2ft x 4ft and flat Weights or some small heavy objects will be handy for holding things in place during the time glue is setting Two types of glue are used for the build Welders glue is use for most areas and CA for the horns and guides When using the Welders glue apply a thin film to each surface allow to sit for approx five minutes and then assemble Note that this method will create a nearl
4. and covering the ply pieces Omit this step 11 your kit did not come with these oval parts On the center crossing of the gear legs you will want to take some thread and wrap it around the entire X assembly and ply plate With Welders this 1s not hugely important but with CA that area will delaminate without the thread Clean up the excess glue 21 40 85 8 Let the glue dry gear assembly without weight on the gear Make sure everything is in place and stays straight as it dries Put Welders on wheel pants and let them tack up Rev 2012 11 04 v004a 28 While the glue tacks up wheel pants lets build the pushrods Scuff up one end of each carbon rod and the long part of the z bend Wipe clean Install the shrink tube and z bend as shown Scuffed end Then let a drop of CA run down the rod and underneath the shrink tubing Rev 2012 11 04 v004a 20 Heat heat shrink to squeeze out excess Hit it with kicker and set aside Here are four completed pushrods ready to install Rev 2012 11 04 v004a 30 Take all the pushrod guides out of the ply sheet and put six on each of the longer two pushrods Push Rod Guide Install the long pushrods in the tail starting by inserting the Z bend in the tail control horns n Then using med find the first small lasered hole for the pushrod
5. lay each piece flat on a hard surface this will allow the airframe to straighten out if lightly bent from shipping Do not worry since EPP is very pliable and can be bent back if out of shape Rev 2012 11 04 v004a 4 KIT 5 11244155 RC Factory 32 Crack Yak 55 lite standard parts list 2x wing half 4x side force generator 1x fuselage 3 parts 1x canopy 2x fuselage truss 1x elevator 1 parts 1x rudder 1 parts 1 3mm dia 700mm wing spar 1x 3mm dia x 300mm wing spar 2x 1mm dia x 500mm control rod 2x 1mm 3mm x 200mm LG strut hardware packet 2x 1 5mm dia x 170mm push rod 1x motor mount fiberglass 2x 1 5mm dia landing gear axle 2x wheels 1x wood horn accessory kit 4x heat shrink tubing pieces 4x z bend wires 4x adjustable connectors Ax streamlined wheel pants Rev 2012 11 04 v004a OPTIONAL PAIRS Power Combo Kit Various thickness CA glues and Matched by Twisted Hobbys Activator available from Twisted Hobbys includes 1x 50 70w 19 24g Outrunner Motor 1x ESC 12A Twisted Hobbys Series 2x 4 5g digital servos 1x 9 0g Servo 1x prop 8x4 3 Carbon Fiber 32 Upgrade Horn Micro Receiver for Lite Series Models Max Recommended Weight 2 9g 2 Aileron Control Surface Arms Minimum of 4 channels required Ax Rudder Elevator Control Surface Arms 1x Aileron
6. pins could be used to hold in position if wanting to handle the airframe before it is completely dry A rotary tool with a cutting wheel could be used to produce grooves in fiber glass parts instead of coarse sand paper Use a hatch pattern This creates more bonding area for the glue Rev 2012 11 04 v004a 51
7. still Rev 2012 11 04 v004a 45 Wipe off excess glue Here is the final electronics install with everything tucked in along the left side Rev 2012 11 04 v004a 46 READY ENJOY Rev 2012 11 04 v004a 47 51 44 11214 C9I GRAVITY 200mm back from Nose of the Fuselage Locate the battery last and use it to establish the proper Center of Gravity Starting CG point is 81 5mm back from the leading edge of the wing If wanting to experiment with the CG point locate the battery with Velcro so that it can be moved around during the process of determining the desired spot CONTROL THROWS 3D Flight 35 to 45 degrees all surfaces elevator 60 degrees 60 to 75 expo Sport 20 to 30 degrees all surfaces 30 to 45 expo For 3D flight set all the control throw up at 35 to 45 degrees This airframe is very equally balanced and designed to like similar throw movements Experiment with Expo and Dual Rates to suit your own flying style Rev 2012 11 04 v004a 48 6 Preflight Checks Motor Should run smoothly at all stick positions and transition smoothly from low to high RPM If the motor is turning backwards reverse two of the three wires between the motor and ESC Check that the screws holding the motor to the airframe are tight and secure Flight Controls Should be centered with sticks 11 the neutral positions Ensure that all controls and linkage
8. 2 11 04 v004a 16 DN Clean up any excess glue Welders on the canopy area and let it ge While the upper fuse 15 drying put tack up Put Welders on the canopy itself and let it tack up Rev 2012 11 04 v004a 17 After glue has tacked up attach the canopy to the fuse Make sure it 15 going in the right direction Put Welders on the Fuse find side and let it tack up Put Welders on the fuse fin side and let tack up Put Welders on th fin and let it tack up need for glue in the elevator joiner area where the half circle is cut out Rev 2012 11 04 v004a 18 Rev 2012 11 04 v004a While the glue tacks up install the control horn in the rudder the same way we did with the ailerons Rudder Horn After the Welders has tacked up glue the rudder to the fuse Start at the top so you can manage the fin to rudder gap and work your way down While everything is drying take the time to keep tweaking it so that everything dries perfectly straight 19 Now you can install the elevator control horn Elevator Horn Now install the side trusses 151 mm ire Cut one of tips off trusses so that you can run the servo wires from the tail servos out of the and tuck the wires back into that space after it 1s 1 finished to clean up the radio install Rev 2012 11 04 v004a 20 A
9. 27070 5 RAE ln FEFOREPIPIUS 32 Crack Y RC FACTORY E Specifications Wing span 32 Length 31 AUW 160 175g with Landing Gear 50 70w outrunner motor 19g 249 6 12 amp ESC 2s 360 450mAh battery 4 ch radio 2x 4g servos 1x 9g servo 8x4 3 prop USA Distributor Twisted Hobbys www twistedhobbys com Rev 2012 11 04 v004a TABLE OF CONTENTS Page WARNING INFORMA HON eee 3 3 SAFETY NOTI ecc 4 IMPORTANT PRIOR TO ANY ASSEMBLY 4 c 5 HESSEN VA Vid Lr etr 6 TOOLS X ADHESIVES NEEDED 112 22222 29222505 525252525802505c5552510250025 CE E ER BEES PEpDGS OE cue De 7 FAFE BOLD re M 8 SAU c 48 CONTROL THROW S 5 225 48 IBN A X
10. Use corresponding drill for the pilot holes Use two screws to hold the plywood aileron horn to the plastic servo arm Rev 2012 11 04 v004a 39 ee 74 E 74 DX kN Aff Rev 2012 11 04 v004a Cut off the ends of the screws Before installing the aileron servo in the airframe sure the differential servo arm assembly 15 removed from the servo it will be installed once the servo is 1n place REMOVE THE SERVO ARM and as as with the tail servos work the wires through the fuselage to the Rx area Then come in with the servo at a 45 degree angle into the cut out next seat the bottom of the servo and then pop it into place making sure the servo tabs go under the tabs in the fuselage that are there to hold the servo Use a couple small dabs of welders to secure the servo Make sure those dabs are in places you can get to them with a knife so that you will be able to remove the servo in the future if the need arises Center the servo electronically slide the arm in and mate with the output shaft 40 Now re install the servo differential arm assembly back onto the servo as shown you will neeed to bend the foam a little to allow access to the servo screw Install the Adjustable Links in the aileron control horns Put the Z bend side of the pushrod into the aileron servo arm and deflect the aileron to insert the rod into the keeper on the con
11. d be used to hold everything flat When resetting your radio start with all the ATV s or throw volumes at 100 Make sure you have set the direction of the servos correctly before attempting to trim for zero position If possible try the servo horns in different locations to determine which position will require the least amount of sub trim Installing the servo horns in their final location and attaching quick links to the servos may make servo installation much easier later On the Orange Rx the negative pin is the one closest to the flat side of the circuit board Keep a good supply of sharp knife blades handy when building a foamie airplane Use low temp hot glue gluing electronics this will allow for easy removal later if necessary The low temp hot glue can be released by painting the glue bead with an alcohol soaked cotton swab a couple times A business card with the corners clipped off can be used as a small square Allowing the Welders glue to set for five minutes before assembly will shorten the tack up time just be sure if doing it this way that you get the parts into position quickly as the glue will start to bond on contact Any joints that you feel are going to require adjustment it is best to assembly the pieces while the glue is wet The Green high tack masking tape works the best when used to clamp things together on an EPP foam airplane When gluing the rudder to the fuselage stick
12. er fuselage Rev 2012 11 04 v004a 13 Put Welders in the tab slots and flat spots between the tab slots on the horizontal fuse piece Be cautious not to put Welders the servo hole areas Put the lower fuse onto the horizontal fuse piece while the glue 15 wet Make sure it is 90 degrees to the horizontal piece and clean up all the excess glue While the lower fuse 15 drying we will install the aileron control horns There are two different shape control horns in the kit The ones angled the same as the hinge line of the ailerons are the 2 correct ones Aileron Control Horn Rev 2012 11 04 v004a 14 Put Welders on control horn Install the control horns while the glue is wet and let dry You may have to cut out the EPP fuzz in the slot in the wing to get the horn to sit flush Trial fit before gluing Also while the lower fuse and control horns are drying fold over the ailerons and weight them down for a few minutes to loosen up the hinges Rev 2012 11 04 v004a 15 Install the upper part of fuse Put Welders on the tab slots and flat part of the fuse Put Welders on the flat parts and tabs of the upper fuse piece insert wet and let dry Take care to make sure the upper fuse is in line with the lower fuse and 90 degrees to the horizontal fuse piece Also make sure the front of all the fuselage pieces are flush This will be important when mouting the motor Rev 201
13. ers because it remains flexible after drying CA however 15 more suited for the quick repair This aircraft should be flown outdoors It is the perfect size for the neighbor park or smaller flying fieild allowing for plenty of opportunity to fly and learn new maneuvers It is a great stand alone plane or training aid to perfect routines to be done with larger aircraft Storage This EPP plane should be hung from it s prop when not in use doing otherwise could cause the airframe to twist Storage in a hot car could also cause damage Be safe and enjoy thank you again for purchasing a Twisted Hobbys Product Rev 2012 11 04 v004a 49 NOTIS amp S U 531412 1 1 Setup Sheet Transmitter Receiver Model ERE L CG Point mm from wing leading edge Electronic Components Travels and Exponential low rate high 3D right aileron up Aileron Servo right aileron down Rudder Servo left aileron up Elevator Servo left aileron down aileron expo rudder right rudder left Battery motor ESC Propeller rudder expo elevator up elevator down elevator expo Rev 2012 11 04 v004a 50 TIBS AND TI3IC2ICES A good building surface is drop ceiling panel from a local hardware store on a nice flat board use parchment pape between the areas being glued and your work surface heavy flat objects like books batteries etc coul
14. gain as glue dries on the trusses keep tweaking and checking to make sure everything 1s totally straight These are all the parts to build the LG assembly 0905 1X Wood Landing Gear Parts 2 Carbon Rounds for Axles ial 4 t 2 Carbon Rectangles for Struts S 2 EPP Wheel Pants Note your may have 4 round parts and no oval parts First thing you will want to do 15 drill out the wheels with a 1 16 dia bit so that the carbon axles fit without a binding Rev 2012 11 04 v004a 2l Second you will glue the little ply angle piece Axle Support to the end of one of the gear legs with thin Axle Support The angle and flat spot created by the ply piece and the carbon gear leg makes a nice joint to glue in the carbon axle with thin CA You will put the little circular ply piece over the carbon axle and it to the ply angled piece to create a hub for the wheel to run against If your kit has 4 of these parts use two per side one to hold the inside of the wheel and one to hold the outside Axle Washer Rev 2012 11 04 v004a 22 Make sure all the pieces are thin securely Then wrap the whole joint with thread After it is wrapped with the thread hit it with thin CA and kicker to finish of the gear leg Rev 2012 11 04 v004a 23 Rev 2012 11 04 v004a This piece 1s very strong and light Next you wil
15. l put on the ply wheel pant mount wheel keeper It just slides over the axle and glues in place with medium or if you are careful thin CA If your kit had 4 of the round washers make sure to put the second one on before gluing on the Pant Support Wheel Pant Support After your gear legs are made the rectangle ply piece goes into the fuselage here Note on some kits the position of the landing gear may be located closer to the nose Landing Gear Bulkhead 24 Fill the slot with welders Note some kits have slots located closer to the nose as shown below There are also two slots in the horz fuse piece for the gear legs Fill them with Welders too While the glue is still wet slide the gear legs through the center fuse piece with one in front of the ply block and the other behind Rev 2012 11 04 v004a 25 Once gear leg comes through the fuse install the oval ply piece over the end of the leg and insert the leg into the slot in the horz fuse piece some kits may not have this part if this 1s the case with yours simply glue right into the foam Landing Gear End Support Slide the oval ring down onto the EPP and make sure it sits flush on the fuse Omit this step if your kit did not come with these oval parts Complete the same thing on the other side Rev 2012 11 04 v004a 26 Rev 2012 11 04 v004a Make sure you have enough Welders in slots
16. left and Elevator and Rudder servo horns shown above Rev 2012 11 04 004 35 g Install the servos I like to install the servos after airframe is built Of course you could install them as you build the plane With the thin EPP it is very easy to install them after constructed and then you can use a very little dab of welders Fish the wires through the fuse and out of the front of the cut off truss Go in at a 45 degree angle until the servo 15 seated in the back and then just press downward to pop the servo in place Rev 2012 11 04 v004a 36 insert rod into the keeper deflect the elevator all the way down and cut off the rod right at the servo keeper Check to make sure that the Keeper rotates freely if not binding will occur in the control system Install the rod into the keeper and center the surface Cut off the excess With the new servos and control geometry we can get really sick throws E ADR now Rev 2012 11 04 v004a 37 Installed keeper and control rod Typical for both elevator and rudder DO NOT OVER TIGHTEN THE SCREW IT WILL DAMAGE THE CONTROL ROD e Next we install the motor mount aa Put Welders on the fuse and let it tack up Rev 2012 11 04 v004a 38 While the motor mount 15 tacking we will make the aileron servo arm You will want to predrill some holes I use the excess screws that come in the servo hardware package
17. nt paper could also be used Install the rods thru the wood ribs as shown Note that the shorter one is on the bottom Wing tip rib shown The hump on both should be facing upward Rev 2012 11 04 v004a 10 Lay down a bead of Welders into the rib and spar areas Lower the assembly into the provided slots allowing any extra glue to squish out The short spar should be buried in the middle section and the long spar should be flush with the bottom of the wing The humps in the ribs will stick out on both inner and out ribs as shown Fill any voids with glue and wipe up as much excess glue as possible Remember we want to keep things a light as possible Rev 2012 11 04 v004a 11 Weigh it down flat on flat surface and let it dry completely special attention to ensure that the wing 15 flat and the spar 1s straight and true gt n 3 zi Get ready to install the elevator Put Welders on the end of the Fuse and let it tack up pem Put Welders on the elevator spread thin and let it tack up Rev 2012 11 04 v004a 12 After tacking for a few minutes assemble the elevator to the fuselage piece Notice there 15 a tab on the stab and fuse that will keep you from putting them on backwards Assembled elevator to fuselage Now install the lower part of the fuselage Put Welders on the tabs and flat spots of the low
18. pilot or an authorized flight instructor for the building and flying of this model aircraft These instructions are suggestions only on how to assemble this model There are other ways and methods to do so Twisted Hobbys has no control over the final assembly the materials and accessories used when assembling this kit or the manner in which the assembled model installed radio gear and electronic parts are used and maintained Thus no liability is assumed or accepted for any damage resulting from the use of the assembled model aircraft or from this instruction manual including but not limited to direct indirect incidental special and consequential damages By the act of using this user assembled product the user accepts all resulting liability In no event shall Twisted Hobbys liability exceed the original purchase price of the kit 314112121NCGS DAMAI Twisted Hobbys checks each plane before shipping to ensure that each kit 18 in fine condition have bearing on the condition of any component parts damaged by use modification or assembly of the model Inspect the components of this kit upon receipt If you find any parts damaged or missing contact Twisted Hobbys immediately We will not accept the return or replacement of parts on which assembly work has already begun Twisted Hobbys reserves the right to change this warranty at anytime without notice OUR MISSION To provide the best products and service to our customers at
19. s move freely Double check that all hinged areas are free from rips or tears Verify proper control surface directions Right Roll 15 right aileron up left aileron down Left Roll is left aileron up and right aileron down Batteries Should be fully charged prior to each flight Watch transmitter battery level and follow manufactures recommendations Motor battery should not be drained any further than recommended by the manufacture use a timer to prevent an over discharged condition Radio All trims should be set to neutral and throttle in the low position Check that rate switches and mixes are set properly Range Check With and without the motor running per radio manufactures instructions If there 1s insufficient range or significant reduction with the motor running resolve and re test before flying TIES TING Flight Testing The first flights should be done with the CG at the recommended position and reduced control rates until comfortable with your handling of the aircraft As your experience with the aircraft grows experiment with different CG points and control rates After all flights check the aircraft over for damage and or other items that may adversely effect flight performance This airframe is full 3D capable EPP plane and will take anything you throw at it including the occasional crash If as the result of a crash the foam tears simple glue with Welders or CA Many pilots prefer Weld
20. the lowest prices possible We take great pride in our company our commitment to customer service and in the products we sell Our online store is designed to provide you with a safe and secure environment to browse our product catalog Thank you for shopping with Twisted Hobbys Rev 2012 11 04 v004a 3 SARFI TY v Before assembling and flying this model read carefully any instructions and warnings of other manufacturers for all the products you installed or used on your model especially radio equipment and power source v Check thoroughly before ever flight that the airplanes components are good shape and functioning properly If you find a fault do not fly the model until you have corrected the problem Y Radio interference caused by unknown sources can occur at any time without notice In such a case your model will be uncontrollable and completely unpredictable Make sure to perform a range check before every flight If you detect a control problem or interference during a flight immediately land the model to prevent a potential accident Youngsters should only be allowed to assemble and fly these models under the instruction and supervision of an experienced adult Do not operate this model in a confined area Do not stand in line with or in front of a spinning propeller and never touch it with any object IMPORTANT PRIOR TO ANY ASSEMBLY Please Note after removing kit from shipping box
21. trol horns Rev 2012 11 04 v004a 4 Manually center aileron and screw down the setscrew 1n the keeper Use a little drop of CA in the keeper to keep the bolt tight After the flue has fully tacked install the mount on the fuselage Take care to make sure it 1s centered and that each of the tabs lines up with the corresponding fuselage piece Rev 2012 11 04 v004a 42 We get tons of throw on ailerons now This is great for slow high alpha rollers NOTE If setting up for extreme throws make sure the control surfaces move freely to the max positions Failure to do this will cause an excess amount of current draw and possible damage to the ESC and or Servos Install the motor to the mount using four screws Make sure the motor wires come out on the same side as your electronics The on this plane 15 still 81 5mm from the LE at the horz fuse piece Balance appropriately with the battery and cut a slot on the top of the fuse to hold the battery in place Rev 2012 11 04 v004a 43 around battery with a pen and use a sharp knife to cut a hole slightly smaller than the battery Battery installed Cut the SFGs out and separate the trailing edges to go over the wing Rev 2012 11 04 v004a 44 Put welders in the slots in wing for the SF Gs Put welders on the tabs and where they intersect the leading edge of the wing Install the SFGs while the glue 1s
22. y instant bond so locate carefully when bringing the two pieces together If alignment is necessary while gluing the two pieces together do not allow the glue to tack up simple apply and join immediately you will have several minutes to locate the two parts before the glue sets up In most cases the parts being glued can be handled with care in 30 minutes full cure 15 approx 24 hours Carbon parts should be sanded and wiped clean prior to gluing Take necessary precautions to avoid breathing the carbon dust Remove wing spar ribs that have the oval holes from the wood kit These are for the inner spar slot where the spar 1s two rods thick The center section to the right 1n this photo is where the oval ribs and double spar go Rev 2012 11 04 v004a 9 Remove little tabs of foam that are in the SFG slots with a sharp knife Glue the wings to the fuselage with Welders Notice how the tabs on each wing prevent you from putting the wings on upside down NOTE USE GLUE SPARINGLY AND WIPE OFF OR REMOVE ANY EXCESS TOO MUCH GLUE WILL INCREASE THE A U W AND AFFECT THE MODEL S FLYING CHARACTERISTICS This is how the spar assembly goes together Short rod in the center first followed by the longer rod over the top of it Rev 2012 11 04 v004a 9 Welders will work it s way through the top of the wing Use some clear packing tape on the bench to keep it from sticking Wax paper or Parchme
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