90-120 YAK Assembly Manual
Contents
1. 90 1 20 YAK 54 ARF OB Quick Build ASSEMBLY MANUAL AEROWORKS 401 Laredo St Unit D Aurora CO 80011 www aero works net TABLE OF CONTENTS Page Aeroworks Contact Information Shipping Damage sscccccccccccsscccccccccccssscsees 3 introduction Warranty c x62210 2002066463 g 663 695006090105v60349301390066 064034 451 06x52996so4y6 4 Kit Conten e 11611 sni1453 canis T E a00dyg0xLts9xsseo69s493 x s 5 Items Needed To Complete sec sac ga n5 s06 4x0 50164645 v34sieiic6siiedosbsw06bs4AaiSsixrqwesssla4e3 cesbbi 8 Tightening and Re shrinking The Covering e eo s se S c mm nen S2 50506 1 1 1 1 5 9 Checking Seams and Color Overlaps for Good Seal Sealing Hinge Gaps 10 WANG ASSEMDIY c v5421620561650014V0s590309604604140 00k6v2x0960 00u06yt eksiosvesboevocgf060s4c9ssi 11 Stab and Elevator 2S SS0IIH Ysv0xi65x9625606060665 0u 9568 6466G0006050 0x4s51S960693954G6b6G9649sticbsigins 16 Rudder Rudder Servo and Tail wheel Assembly cccccccccccccccsccccccccsssscccccees 20 Main Landing Gear and Wheel Pant Assembly cccccccccsscccccccccccccssscsscccccccsscccs 32 Engine Muffler and Throttle linkage insfal ation os lt lt lt lt lt lt lt lt lt lt lt lt lt lt ssss 37 Fuel Tank Assembly and I2. 2 Install a short length of fuel tubing to the vent 4 Insert the Velcro one wrap strap under the fuel tube and the fuel pick up tube as shown Then tank floor as shown insert a fuel T into each fuel tube as shown 3 Secure the fuel tubing with nylon ties to the 5 Install the foam rubber pad onto the fuel tank pick up tube and vent tube as shown floor as shown 53 6 Install the fuel tank into the fuse as shown 8 Install the plywood fuel tank rear retainer into Pass the fuel line and vent line with the T s the pre cut slots in the fuse motor box sides as through the pre cut hole in the firewall En shown sure the fuel vent tube is at the top of the tank Secure the tank with the Velcro one wrap as shown 7 Locate the plywood fuel tank rear retainer as 9 Glue the fuel tank rear retainer to the motor shown below box sides as shown using CA glue 54 10 Connect the fuel pick up line to the engine car 12 Secure the re fueling and vent line tubes to the buretor fuel fitting A fuel filter is recom inside of the fuse muffler cutout using plastic mended Connect a length of fuel tubing to the clamps and screws as shown fuel pick up line T to run out the bottom of the cowl for re fueling Install a fuel line plug Note Plastic clamps are not provided We found into the refueling line as shown nylon landing gear straps to work nicely Note When fueling your model have the throttle fully
3. up 1 1 4 or 18 up 1 1 4 or 14 down 1 1 2 or 20 down For 3D flying use the following throws 3D Rate Aileron 2 1 2 or 35 up 2 1 2 or 35 down Rudder 2 left 2 right Full rudder deflection is typically recommended for all out 3D Elevator 3 1 2 or 45 up 3 1 2 or 45 down Recommend Expediential 15 expediential on low rates 30 expediential on high rates 60 expediential on 3D rates Use the given rates as a starting point Then adjust rates from there to suit your own flying style 73 PRE FLIGHT CHECK LIST Preflight Check List Range check Do a range check with and without the engine running in accordance with the radio manufacturer instructions If there is insuffi cient range or a large reduction with the engine running do not fly until it is resolved Center of Gravity Check CG is set properly Engine The engine should run smoothly at all throttle settings with smooth transition from idle to full throttle without stalling hesitation Do not fly an unreliable engine Read engine instructions including break in and tuning completely Pay close attention to the engine temperature Flight Controls Ensure all flight controls are free from binding and are centered Check that all hinges are tight and will not pull out Control linkages must be rigid and tight and have no slop Confirm proper direction of ailerons rudder and elevator Experienced flyers have lo
4. Use a drill bit to drill the engine mounting width of the engine used Use a small C clamp holes in the engine mounts as shown Ensure and clamp the engine to the engine mounts as the drilled holes are perpendicular to the en shown Adjust the engine mounts evenly so the gine mounting surface mounting bolts are centered in slots of engine mounts then final tighten the engine mounting bolts into the firewall Note The required distance from the front of the firewall to the front of engine prop hub Back of spinner is 5 11 16 as shown below SIs 2 8 Gather the 4 8 32 x 30mm Hex Head engine 6 Mark the center of each engine mounting hole mounting bolts 8 8 flat washers and with a center marking tool or beveled pencil or 4 8 32 Lock nuts as shown below pen Ensure the mark is in the center of the en gine mounting hole Note Only four 8 flat washers have been Note We recommend the Great Planes Dead supplied with your model Center Engine Mount Hole Locator Part GPMRS130 38 9 Install the engine onto the engine mounts Use 2 Mark the location of the throttle pushrod exit flat washers between the bolt head and engine hole on the firewall Ensure the pushrod will and the engine mount and lock nuts Tighten not bind on the firewall engine mount or en firmly gine when installed Te A So os Four Stroke Throttle Servo Installation 2 1 Gather the throttle servo and thr
5. any way guarantee the performance of your completed model and no representations are expressed or implied as to the performance or safety of your completed model INTRODUCTION Your new 90 1 20 YAK 54 ARF QB is a highly aerobatic airplane It is capable of both precision and 3 D maneuvers The aircraft builds easily quickly and precisely due to the revolutionary QB Quick Build Design LASER cut technology and high quality included hardware We hope you enjoy building and flying your 90 1 20 YAK 54 ARF QB Great care has been taken in both the design and manufacturing of the 90 1 20 YAK 54 ARF QB to allow for the strongest and lightest construction possible Only the highest quality materials from the covering paint wood and hardware have been used in the con struction of this model The 90 1 20 YAK 54 ARF QB has been individually hand built covered and painted by trained and experienced craftsmen with over 27 years of manufacturing experience Using CAD design laser cut technology and jig built assures accuracy in all stages of production The 90 1 20 YAK 54 ARF QB is designed for engines in the 90 to 1 20 category The Saito 1 25 4stk and OS 1 20AX 2stk engines are shown in the assembly instructions The aircraft was tested with both engines and has outstanding performance The final choice of engine is left up to the builder A computer radio is recommended to allow the pilot to take advantage of the full capabilities of thi
6. closed This will close off the fuel flow to the carburetor and only allow fuel to enter the fuel tank 11 Connect the fuel vent line to the engine muf fler pressure fitting as shown Connect a length of fuel tubing to the vent line T to run out of the bottom of the cowl for venting dur ing refueling Install a fuel line plug into the vent line as shown 55 COWL INSTALLATION 1 Gather the cowl and the provided exit air cut out templates as shown below 3 Use arotary cutting tool file and sandpaper to cut out and smooth the edges of the cooling openings in the bottom of the cowl as shown Note Take care not to cut or scratch cowl 2 Place the exit air cutout templates along the bot tom of the cowl as shown Align templates with the rear edge of the cowl and tape in place Use a felt tip pen to trace the cutout openings onto the cowl as shown 4 Cooling air exit holes cut into bottom of cowl Note Pay close attention to the marker you Note choose Some permanent markers may not be easily removed Also When using rubbing alcohols or other paint removers always test on painted parts before using We have found this to provide adequate cooling Depending on your engine you may need to allow for more exit air cooling for your engine to run at its recommended operat ing temperature Always check the operating temperature of your engine to prevent any damage from occurring Aeroworks is not res
7. cover ing has been provided for sealing of the hinge gaps if desired Remember to work quickly Gather the stab and elevator control horn and four mounting screws 4 Secure control horn using four wood screws as 2 Align the control horn over the factory drilled shown holes Note Ensure arm of control horn faces towards Tip End of elevator Refer to picture 16 5 Elevator control horn installed on bottom of 2 Plug the elevator servo leads into the extension elevator as shown Elevator Servo Installation 1 Gather elevator servo mounting screws servo arm and 18 extension as shown 3 Secure the servo connectors with safety wire string tape or other method Ensure the con nectors will not come apart from vibration or light tension Note We recommended using a 1 or 1 4 servo arm for best results Note Recommended Servo Requirements min 140 in oz Digital Metal Geared N 17 4 Lay out the elevator servo output shaft to 6 Install servo output shaft to rear with servo rear and extension on the fuse to check for mounting screws proper length 5 Mark locations of servo mounting holes Use 7 Gather the elevator control linkage parts as a 1 16 bit to drill servo mounting holes shown below There is one 4 40 pushrod with RC link and nuts one 4 40 ball link assembly with brass spacer 4 40 bolt and lock nut for each elevator 18 8 Assemble t
8. into the servo arm Glue the bracket in place using CA glue 15 Install the nylon pushrod keeper onto the push 17 Use a drop of blue Loctite on the muffler bolts rod as shown prior to installation Note It will be necessary to remove the muffler during the fitting and installation of the cowl We recommend NOT using Loctite until final muffler installation 50 18 Securely tighten the muffler mounting bolts as shown Note Itis recommended not to permanently tighten the muffler bolts at this time It will be necessary to remove the muffler during the cowl installation Note We recommend using a Bisson Pitts style muffler part 4120 for a easier and cleaner installation Available through Aeroworks or direct from Bisson custom mufflers at www bissonmufflers com 51 FUEL TANK ASSEMBLY AND INSTALLATION Fuel Tank Assembly 3 Insert the rubber stopper into the tank with the vent tube at the top of the tank Secure the stopper with set screw Take care not to strip threads by over tightening set screw 1 Gather the fuel tank parts as shown below 2 Assemble the fuel tank as shown below Fuel Tank Installation Secure the fuel tubing with nylon ties to the pick up tube and clunk Bend the vent line 1 Gather the fuel tank parts as shown below Fuel tube up as shown tubing fuel T s fuel line plugs and Fuel Filter Note Fuel Ts Fuel line plugs and Fuel filter are not included 32
9. necessary we recommend moving the engine forward slightly by adding extra spacer or washers to move the C G forward Try this before adding an additional weight For aerobatic flying a more aft balance point is better For smooth sport flying or precision pattern a more forward CG 1s better An air craft that 1s too nose heavy does not fly well and 1s difficult to land A tail heavy aircraft is uncontrollable and will likely crash Control Throws The amount of control throw should be adjusted using mechanical means as much as possible and then electronically with the radio The control throws are shown in degrees and inches of deflection Aileron throw measured in inches at the widest point of the aileron 2 Elevator throw measured in inches at the 4 Use a flight control deflection meter to measure widest point of the elevator the throws in degrees It is recommended you level the model as shown Deflection meter available from Aeroworks 3 Rudder throw measured in inches from the rudder boost tab 5 Aileron throw measured in degrees Locate throw meter at widest point of the aileron T2 6 Elevator throw measured in degrees Locate Control Throw Deflection Table throw meter at widest point of the elevator Low Rate High Rate Aileron 1 1 2 or 18 up 1 3 4 or 30 up 1 1 2 or 18 down 1 3 4 or 30 down Rudder 1 1 4 left I 1 2 left 1 1 4 right 1 1 2 right Elevator 1 or 12
10. stroke engine is used and it is necessary to cut out a relief hole for the engine cylinder head and valve covers 14 Tape a strip of template paper to the side of the fuse and over the engine cylinder head as shown Install the cowl using all four cowl screws and trace the cutout opening onto the side of the cowl as shown Remove the cowl and use a rotary cutting tool to cut out the opening as described in the previous steps 60 RADIO INSTALLATION 1 Gather the radio components as shown below 3 Use a hobby knife to cut out the switch open Battery regulator switch and receiver ing Note We have selected to use Lithium Ion Fromeco Battery and regulator The choice of battery used is left up to the builder 2 We chose to mount the radio switch on the 4 right side Mark the location for the radio switch using the switch mounting plate for a template Insert the switch into the switch hole as shown Note Ensure switch does not interfere with wings 61 5 Mount switch in accordance with the switch 7 Install a nylon tie wrap into the fuse floor as manufacturers instructions and hardware shown for securing the receiver batteries 6 Install the regulator if used to the fuse floor 8 Use apiece of supplied foam rubber to form a using the manufacturers instructions and hard battery mounting pad and place the receiver ware as shown batteries on the foam 62 9 Secure the receiver batteries
11. blies 4 wheel collars 2 wheel pants and landing gear mounting hardware 3 2 Gather the landing gear strut 4 8 32 bolts 4 Note that the trailing edge of the landing gear 4 lock washers and 4 flat washers strut is tapered The tapered edge goes toward the rear of the fuse STRAIGHT EDGE TO FRONT OF FUSE TAPER TO REAR OF FUSE 32 5 Assemble the landing gear bolts with lock 7 Reinstall the landing gear cover Use a drop washer and flat washer Use a drop of blue of blue Loctite on the landing gear cover bolts Loctite on landing gear bolts before attaching before attaching the cover the landing gear 6 Bolt landing gear strut to fuse with four bolts Wheels and Wheel Pants Installation and washers Ensure tapered edge of the gear strut is facing toward the rear 1 Gather the wheel and wheel pant parts as shown below 1 wheel 1 axle assembly 1 wheel pant 2 4 40 mounting bolts 2 flat washers and 2 wheel collars 33 2 Install the axle into the gear strut with nylon 4 Install one wheel collar against the axle bolt as lock nut shown Securely tighten wheel collar to axle JU SYJOM OJILMAMA 3 Align the flat sides of the axle bolt vertical and 5 Wheel collar installed against the axle bolt snug the lock nut against the landing gear strut 34 6 Install wheel and then the other wheel collar 8 on the outside of the wheel as shown Use a drop of blue Loctite on the wheel
12. collar screw before final installation 7 Securely tighten the outside wheel collar set 9 screw as shown 10 35 Install the wheel pant slot over the axle bolt as shown below If needed Rotate the axle bolt to align the wheel pant mounting holes with the holes in the landing gear strut Install the wheel pant mounting bolts and washers as shown Use blue Loctite on the bolts before final tightening Securely tighten the wheel pant mounting bolts and axle bolt Repeat the previous steps for the other wheel and wheel pant 11 Final gear assembly with wheel pants in stalled 36 ENGINE MUFFLER AND THROTTLE LINKAGE INSTALLATION Four Stroke Engine Installation 3 Use a drop of blue Loctite on the engine mounting bolts before installing 1 The 90 1 20 YAK 54 will accept a wide range of engine types Illustrations for a Saito 1 25 four stroke are provided below Gather the engine to be used muffler and engine mounts with hardware as shown below Note Installation for two stroke engine shown starting on page 44 2 Engines are side mounted Install the engine 4 Screw the engine mounting bolts all the way in mounts as shown below The large webbing but DO NOT tighten yet on the engine mounts goes toward the cylinder head of the engine Note The engine mounts have been designed to be adjustable to fit a wide range of engines 37 5 Adjust the width of the engine mounts to fit the 7
13. cowl mounting bolts and rubber backed washers The rubber 4 Slide the wing tube in the fuse wing tube backed washers are to prevent the fiberglass sleeve Slide the wings on the wing tube and cowl from cracking and keep bolts from plug in the aileron servo connectors Slide the coming loose from normal engine vibration rubber backed washers on the wing mounting bolts and insert bolts through the fuse side and into the wing root blind nuts Tighten snugly but do not over tighten and crack the fuse or wing root wood 65 5 Gather the 4 4 40 stab mounting bolts and 7 Gather the 4 4 40 hatch mounting bolts and 4 6 small rubber backed washers 4 6 small rubber backed washers Note Itis highly recommended you apply thin CA glue to the front hold down dowels This is a high vibration area and can loosen the front dowels Always check the front dowels are secure before each flying session Us thin CA to secure front hatch hold down dowels 6 Slide the stab tubes in the fuse stab tube Sleeves short tube front long tube rear Slide the stabs on the stab tube Slide the rub ber backed washers on the stab mounting bolts and insert bolts through the stab mounting tabs and into the fuse blind nuts Tighten snugly but do not over tighten and crack the stab mounting tabs or the fuse sides Connect ele vator pushrods to elevator control horns 8 Slide the rubber backed washers on the hatch mounting bolts and ins
14. decal in proper location Applica 14 Pull transfer tape from top of decal Take tion fluid will allow decal to be moved slightly care not to pull away or damage decal EROWORKSS 13 Using a plastic squeegee or credit card Spread 15 Let decal dry completely decal smooth and remove all excess application fluid Let decal set until dry enough to be able to remove transfer tape with out removing decal Do not leave until completely dry or transfer tape will be difficult to remove AEROWORKS 70 CENTER OF GRAVITY CONTROL THROWS Center of Gravity Warning DO NOT skip this step 1 The recommended CG is 3 3 8 back from the wing leading edge at the WING TIP as shown 2 Balance the 90 1 20 YAK 54 ARF QB without fuel in the tank with the batteries installed and READY TO FLY The engine radio servos and batteries you use will determine the final weight and locations of equipment Try to bal ance the model by moving the batteries and re ceiver before adding any ballast 7 Start at recommended CG until you are com fortable with the flight characteristics of the aircraft You may find this a bit nose heavy at first but that is fine to start with After you are comfortable adjust the CG to suit your flying style in small steps especially when shifting the CG toward the tail Move the battery or add small stick on weights to the nose or tail as necessary Note If additional nose weight is
15. e top leading 17 Attach the RC link with threaded coupler to edge of the vertical fin in the neutral position the rudder control horn Next thread the rud as shown This ensures the rudder 1s straight der cable through the threaded coupler and when the cables are attached back through the brass swage tube With the rudder servos powered up and centered pull light tension on the cable through the coupler as shown 26 18 Loop the cable back through the brass swage 20 Crimp the brass tube with a crimping tool or tube as shown pliers 19 Pull the loop through the coupler until it is approximately 1 2 long 21 Cut off excess cable as shown 21 22 A drop of thin CA may be applied to the 25 Rudder cables attached to the rudder control swage tube to help secure the cable horn and adjusted 23 Repeat previous steps for opposite side rudder cable 24 Remove tape from rudder and adjust rudder pull pull cables to desired tension by screwing Tail Wheel Installation in or out on the threaded couplers and RC links Make all adjustments with the rudder 1 Gather the tail wheel parts shown below servo still powered up and centered Tail wheel strut 3 tail wheel mounting screws aluminum steering tiller 2 tiller mounting Note Using a rubber band or light spring around screws and 2 steering springs the cables close to the couplers will help elimi nate any cable slop 28 2 Place tail whee
16. ert bolts through the hatch mounting holes and into the fuse blind nuts Tighten snugly but do not over tighten and crush the hatch or the fuse sides 66 DECAL INSTALLATION 3 Factory placement of decals 1 Decals supplied with the kit may vary from the photos below Decal application steps will be similar Gather supplied decals transfer tape ruler scissors hobby knife plastic squeegee or credit card Application fluid like Rapid Tac Also a solution of 1 drop of dish detergent to a cup of water sprayed on the model will assist in proper positioning Note Clean surface and tighten all covering before any decals are applied AEROWORKS 9K i www aero works net www aero works net Factory placement of decals AEROWORKS 9K il 2 67 4 Cut out desired decal from decal sheet 6 Remove backing from Clear transfer tape 5 Cut transfer tape to accommodate decal size K Apply clear transfer tape over top of decal Note Transfer tape will be reused DO NOT throw away any transfer tape until decal installation is complete Decals supplied with the kit may vary from the photos below Decal application steps will be similar 68 8 Press transfer tape to top of decal 10 Spray model surface with application fluid or soapy water solution 3 Peel backing from decal 11 Spray back side of decal with application fluid or soapy water solution 69 12 Position
17. ervo extensions Heavy Duty 22 gauge min 4 x 6 Aileron Receiver 1 x 12 Throttle 2 x 18 Elevators e 1 Receiver PCM recommended e 1 Receiver battery min 6 0 volt 1700ma e 1 switch with charge jack 22 Gauge min 2 Fuel T 1 Fuel filter Tools e Allen wrenches US and Metric e Dremel cutting disc and sanding drum tool e Electric drill and selection of bits e Flat head screwdriver e Hobby heat gun e Hobby iron with protective sock e Masking tape e Modeling knife e Needle nose pliers or crimping tool e Paper towels e Pen pencil or felt tipped marker e Phillips screwdriver e Ruler and tape measure e Scissors e T pins e Waxed paper e Wire Cutters Adhesives 15 30 Minute epoxy Blue Loctite Epoxy mixing cups sticks brushes CA kicker optional Thick and Thin CA Rubbing alcohol Wipes Some rubbing alcohols may attack painted parts TIGHTENING AND RE SHRINKING THE COVERING 1 Open your kit slowly and take care not to dam 3 If bubbles persist use a small pin to punch holes age any parts of the kit Remove all parts from in the bubble to relieve trapped air and reheat their plastic protective covers for inspection Before doing any assembly or installation of any decals it is very important to re shrink or re tighten the already applied covering Due to the shipping process heat and humidity changes from different climates the covering may become lose and wrink
18. es installed and glued Pre drilled for the mounting of the control horn 1 8 32 blind nut installed for the wing mounting 2 Aluminum anti rotation dowels installed pre drilled hole for cotter pin installation 6 pin point hinges installed glued Read to fly 1 Aileron servo pull string installed Horizontal Stabilizer with elevator assembly covered 8 4 per elevator pin point hinges glued Ready to fly Elevators Pre drilled for the mounting of the control horns Rudder with 5 pin point hinges not glued covered Rudder Pre drilled for the mounting of the hinges control horns and tail wheel steering arm SUB ASSEMBLIES 1 1 Fiberglass Cowling painted pre mounted 4 4 40 x 10mm hex style bolts for mounting cowl 4 6 bonded washers for mounting cowling 4 3mm split lock washers for mounting cowling 2 1 3mm 7075Aluminum Main Landing Gear painted 2 4mm x 33mm Axle Bolts 2 M4 lock nuts 2 4mm flat washers 4 4mm 1 d Wheel Collars with set screws 2 63mm Dia Main Wheels Lite Type 4 4 40 x 10mm hex style bolts for mounting wheel pants 4 3mm flat washer for mounting wheel pants 4 3mm split ring lock washer for mounting wheel pants 4 8 32 x 16mm hex head bolts for mounting main landing gear 4 4mm flat washers for mounting main landing gear 4 4mm split ring lock washers for mounting main landing gear 3 2 Wheel Pants Painted pre mounted 1 Left and 1 Rig
19. he pushrod assembly as shown 10 Correct installation of ball link and brass spacer to servo arm shown below Improperly installed servo linkages can cause servos to strip and elevators to flutter Elevator flutter can and will destroy your model instantly Lock Nut 9 Install the servo arm to the ball link as shown 11 Attach the pushrod to the elevator control horn and the servo arm as shown Adjust the linkage so the servo arm 1s perpendicular to the servo when the elevator is in the neutral position as shown Repeat previous steps for other stab and elevator assembly 19 RUDDER RUDDER SERVO AND TAILWHEEL ASSEMBLY Rudder Installation 2 1 Gather the rudder hinges epoxy Vaseline stir sticks mixing cup and alcohol as shown Use 15 30 minute epoxy to ensure adequate working and cleanup time Mix epoxy in mixing cup and use a tapered stick to apply the epoxy inside the pre drilled holes in the trailing edge of the fin Apply epoxy to one side of each hinge and insert the hinge completely into the hole 2 Prep all hinges for installation by applying 4 Vaseline petroleum jelly or light oil to the hinge joint This ensures no epoxy gets into the hinge during assembly Note Ensure the hinge axis is vertical and parallel to the trailing edge of the fin before epoxy cures Wipe away excess epoxy with alcohol wetted wipes Epoxy the hinges into the fin first and allow epoxy to fully cure Ensure you ha
20. ht 4 4 40 blind nuts installed in the wheel pants 2 per side 4 1 Tail Wheel Assembly small 1 Aluminum steering arm and mounting screws 2 Steering springs 5 1 20mm O D x 654mm Carbon wing tube 1 8mm O D x 92mm Carbon stab tube Front 1 8mm O D x 290mm Carbon stab tube Rear 2 8 32 x 25mm Hex head bolts for wing mounting 2 8 bonded washer for wing mounting 2 4mm split ring lock washers for wing mounting 4 4 40x10mm Hex style head bolts for stab mounting 4 6 bonded washer for stab mounting 4 3mm split ring lock washers for stab mounting 4 1 8mm cotter pins Second method wing mounting for security 6 2 4 40 x 3 Two end threaded pushrod with nuts and clevises for ailerons 2 4 40 x 5 1 2 Two end threaded pushrod with nuts and clevises for elevators 1 2mm x 300mm One end threaded pushrod with lock nut throttle 1 3 5mm x 400mm plastic guide tube throttle 1 nylon clevis throttle 1 plastic quick link throttle 2 plywood support brace throttle 1 servo mounting tray throttle 4 4 40 Ball Links 2 for ailerons 2 for elevators 4 Brass spacers for ball links 7 2 0 8 x 850mm plastic coated pull pull steel cable 4 M2 Metal R C links with metal clevises and nuts 4 3 x 4mm brass pull pull swaging tubes 3 AW control horn Left 3 AW control horn Right 24 T2 6 x 12mm Phillips head mounting screws 8 1 450cc 15 2 ou
21. ire and push forward through the tle servo mount as shown hole in the firewall as shown 3 4 2 13 Extend the nylon tube forward of the firewall 15 Remove the nylon tube and cut at the mark as approximately 1 2 as shown shown 42 16 Reinstall the nylon tube over the throttle push 18 Use needle nose pliers to bend the throttle rod Slide the plywood throttle pushrod sup pushrod wire 90 up over the trottle servo port bracket over the nylon tube Mark the output arm hole as shown length of the bracket inside the motor box as shown 17 Remove the plywood throttle pushrod support 19 Use wire cutters to cut off the excess pushrod bracket and cut to length Reinstall the wire above the throttle servo output arm hole bracket on the nylon tube and glue in place as shown using CA glue 43 20 Insert the throttle pushrod into the servo output Two Stroke Engine Installation arm and install the nylon pushrod keeper onto the pushrod as shown 1 The 90 1 20 YAK 54 will accept a wide range of engine types Illustrations for an OS 1 20 AX two stroke installation are provided below Gather the engine to be used muffler and engine mounts with hardware as shown below Note We recommend using a Bisson Pitts style muffler part 4120 for a easier and cleaner installation Available through Aeroworks or direct from Bisson custom mufflers at www bissonmufflers com 21 Final installation of four
22. l steering tiller over the pre 4 Mount the tail wheel steering tiller using two drilled holes in the bottom of the rudder wood screws B ik gt F Hii O u 3 Apply a drop of thick CA to the mounting 5 Place the tail wheel strut over the pre drilled screws before inserting into the tiller mounting mounting holes on the bottom rear of the fuse holes 29 6 Place a drop of thick CA on tail wheel strut 8 Attach the steering spring to one side of the mounting screws before inserting in the pre rudder tiller Center the spring between the drilled mounting holes rudder and tail wheel tiller 7 Mount the tail wheel strut using three wood 9 Use pliers to twist spring ends closed around screws the rudder tiller 30 10 Slightly stretch the spring and insert through 13 Tail wheel final assembly is complete the tail wheel tiller Use pliers to twist spring ends closed around the tail wheel tiller 11 Cut off excess spring wire as shown 12 Repeat for opposite side tail wheel spring Adjust length and spring tension so that tail wheel is centered when rudder is centered 31 MAIN LANDING GEAR AND WHEEL PANT ASSEMBLY Remove the landing gear cover by removing Main Landing Gear Installation 3 the two bolts on the bottom of the cover Lift 1 Gather the landing gear parts as shown below out the landing gear cover after removing the 1 landing gear strut 2 wheels 2 axle as two mounting bolts sem
23. le in the sun If you take the time to re tighten the covering you will be rewarded with a long lasting beau tifully covered model tg 4 Use your heat gun with extreme caution Take care not to apply too much heat to one area for long periods of time This may cause the trim colors to over shrink and pull away leaving un sightly gaps on the color lines The trim stripes are especially vulnerable to over heating and over shrinking 2 Using your covering iron with a soft sock gently apply pressure and rub in the covering If any bubbles occur your iron may be to hot Reduce heat and work slowly Go over any and all seams and color overlaps with your iron to assure good adhesion of the covering to the wood This is especially im portant at the leading edges of the wings and Stabs 5 You model is covered with Ultracote cover ing In case of repairs the colors are Midnight Blue HANUSS5 Dark Yellow HANUS89 True Red HANUS 66 White HANUS70 Tightening and re shrinking the covering is now complete However this is a never ending process and should be checked after each flying session CHECKING SEAMS AND COLOR OVERLAPS FOR GOOD SEAL SEALING HINGE GAPS 1 Go over all seams and color overlaps with your 3 Sealing hinge gaps This is an optional step sealing iron but 1s recommended Cut strips of the supplied clear covering to fit the hinge gaps Use covering iron to seal the clear covering snugly i
24. ments are made double check your paper templates are still accurate 58 9 Use a felt tip pen to trace the location of the 11 Cuta relief hole into the muffler pipe template glow plug access hole onto the side of the cowl to allow the template to lay flush on the bottom as shown of the cowl as shown Use a felt tip pen to trace the muffler pipe cutout onto the bottom of Note Always check that the marker selected can the cowl as shown be easily removed Check on inconspicuous spot prior to marking AL 4 d ne w e Amua Dea DO a t hii k oe C STS i r at ey 10 Use a drill rotary cutting tool or round file to cut 12 Remove the cowl and use a rotary cutting tool the glow plug access hole into the side of the to cut out the muffler pipe opening in the bot cowl Ensure the hole is large enough to insert tom of the cowl as shown the glow plug igniter through Note Make any necessary holes for the engine carburetor adjustment needles where necessary 59 13 Typical muffler pipe cutout in bottom of cowl 15 Note Take care and test painted areas prior to using any type of paint remover rubbing alcohols or cleaners to remove any pen lines Trace and cut out a relief hole for the engine cylinder head and valve covers as shown En sure there is adequate clearance all around the cylinder head NOTE The following steps are only needed if 16 a side mounted four
25. nce Fuel Tank assembly 1 2ft fuel line glow 9 1 Plywood Fuel tank retainer 1 130 x 70 x 6mm foam Fuel tank 2 300 x 80 x 6mm foam Receiver and Battery 2 5mm Nylon ties Receiver and Battery 1 356 x 12 5mm Velcro one wrap Strap fuel tank 1 Pre made Cowl template cutting hot air exit holes 3 pcs set 2 200 x 280mm card stock template material for cutting cowling 10 Ultracote Small patches and repairs 1 300x300mm Midnight Blue HANU885 1 300x300mm_ True Red HANU866 1 300x300mm Dark Yellow HANU889 1 300x300mm White HANU870 1 600x300mm Transparent covering Sealing hinge gaps 11 1 3 Spinner assembly white 12 2 Adjustable engine mounts 1 Left 1 Right 8 8 32 x 30mm Hex head bolts mounting of engine mounts and engine 4 8 32 Lock nuts engine mounting 4 4mm flat washer engine mounting 4 4mm split washer engine mounting 13 1 Custom Vinyl Decal Set 14 1 Assembly manual on CD with picture folders ITEMS NEEDED TO COMPLETE Hardware 00 to 1 20 glow two stroke or four stroke engine with muffler Propeller of your choice 2 x aileron servos min 140 in oz Digital Metal Gear 1 x rudder servo min 180 in oz each Digital Metal Gear 2 x elevator servos min 140 in oz Digital Metal Gear 1 x throttle servo fast reliable Servo arms 2 x 1 Ailerons 2 x 1 Elevators 1 x 2 duel arm Rudder S
26. nstallation lt lt ececcc s5 S505 S2 S1 1S 115050506655 52 COWLINS AN AION iiss eda ct so 603000806000 0400luuxi160V20080068450xosbsiggG00 8igdu4 6480Ab2ou6yi 0sis8886504 0 64 56 R di Installations cs 126 16212620662244205546000966063606q6010a4i6 4002004000w5 w6axs4g8 3 005 1248i33 2008423602 65 61 Prete ht Preparation 2211266203200 00g p2a0xxav1s0ds963636092086600926086a586086bs090629 0066is9s60 x5 65 Decal mstallationy v y 2e4 416 s60 b t36s odsgb064a 08504 00040b24344414 6614 0 53808au c0iblcetseaildsib94 8Eieaiotbseelsa 67 Center of Gravity Control THEOWS ci622221640102 0495 046661044640 26069060exiscbaEAs6gs 4406345120600 0464 71 PreMebt Check Dist cz4s22x6i c2200000604s000460160i0s0 00s44u8iscbobobscspssesostusailbdusGsss abscdpboto is 74 AEROWORKS 401 Laredo street Unit D Aurora CO 80011 Phone 303 366 4205 Fax 303 366 4203 Website www aero works net E mail Info aero works net Thank you for choosing the Aeroworks 90 1 20 YAK 54 ARF QB We put great effort into making this plane the best model you will ever build and fly We have provided you with the highest quality kit and performance possible We wish you great success in the assembly and flying of your new Aeroworks 90 1 20 YAK 54 ARF QB WARNING An R C aircraft is not a toy If misused it can cause serious bodily harm and property damage Fly only in open areas and AMA Academy of Model Aeronautics ap
27. nto the bottom of the hinge lines as shown for air tight hinge seals Note Even if your models covering has no wrin kles out of the box it is still very important to go over all seams and overlaps to make certain they are sealed securely This is especially important at the leading edges of the wings and Note The clear covering does have a transparent stabs We recommend checking the covering protective backing This must be removed after each flying session prior to applying 2 Use covering iron to ensure all edges seams IMPORTANT ane Corer a are VEEVEESD TBR VEB It is the responsibility of the purchaser operator to check the covering seams and overlaps for security and a good seal Aeroworks is not responsible for failure of covering seams or overlaps during flight Note If covering continues to lift apply a small amount of thin CA underneath the covering Then using a clean rag apply pressure to secure d One of the most important tools in your flight box is a roll of clear tape This can be used at the field for fast and easy repairs of the covering Then once you have finished flying the covering can be permanently repaired 10 WING ASSEMBLY Aileron Servo Installation 1 The ailerons have been pre hinged and glued to 3 _ Secure the extension to the servo lead with the wing panels and are ready for flight No safety wire string tape or other method En other steps are necessary fo
28. of control horn faces towards bottom of rudder Refer to picture 3 Use thick CA on each screw prior to installing 5 Gather the 2 cables 4 brass swaging tubes to lock screws in place and 4 RC links with threaded couplers as shown Note CA glues have a fast drying time Remember to work quickly 23 6 Feed the rudder cable through the pre installed 8 Insert rudder cable through the brass swage cable exit tube in the tail of the fuse toward the tube then through the threaded coupler hole front Repeat on other side and back through the brass swage tube as shown 7 Pull the rudder cables from the fuse tail to the 9 Loop the cable back through the brass swage rudder servo tray tube as shown Note Cables run straight Do not cross cables 24 10 Tighten the second loop through the brass 12 A drop of thin CA may be applied to the swage tube and crimp the brass tube with a swage tube to help secure the cable crimping tool or pliers 11 Cut off excess cable as shown 13 Attach the RC links to the rudder servo arm and attach the rudder servo arm to the rudder servo as shown Note You will want to use a minimum of 2 to 3 servo arm 25 14 Plug the rudder servo into the rudder channel 16 Slide brass swage onto rudder cable of the receiver and power up Turn on trans mitter to center rudder servo Remember too center trims and sub trims 15 Tape the rudder balance tab to th
29. ottle servo 5 mounting hardware as shown below 3 Use a drill to drill the pushrod exit hole into 1 2mm x 300mm One end threaded pushrod het cowall 1 3 5mm x 400mm plastic guide tube 1 nylon clevis 1 plastic quick link 2 plywood support braces 1 servo mounting tray 39 4 Install the RC link onto the pushrod with stop nut as shown 6 Install the throttle servo into the pre assembled servo mount Mark the position of the servo mounting holes Use a 1 16 drill to drill the servo mounting holes 3 Insert the throttle pushrod through the firewall and connect RC Link to engine throttle arm as shown gt aS gt Ss as Aii i gt lt M 7 Install the throttle servo into the servo mount using servo mounting screws 40 8 Dry fit the servo mount inside the motor box 10 Apply 5 minute epoxy to the side of the servo just forward of the wing tube Ensure the mount that will be in contact with the motor throttle pushrod will line up with the servo box side output arm with no binding 9 W0rks nef 9 Mark the location of the servo mount onto the 11 Install the servo mount to the inside of the mo inside of the motor box side as shown tor box as shown Use tape or clamps to en sure the servo mount does not move until the epoxy sets 41 12 Slide the nylon outer tube over the throttle 14 Mark the nylon tube over the front of the throt pushrod w
30. ponsible for damages incurred from improper engine cooling Note Holes in template are not centered front to back There is a wider and thinner section Wider section goes toward rear of cowling Thin Section Wide Section 56 Muffler Glow Plug and Cylinder 3 Mark the location of the muffler pipes on the Head Cowl Cutouts template paper as shown below Draw a cut out hole pattern that provides approximately 1 4 clearance all around the muffler pipes 1 Gather the provided card stock template paper onto the template paper and tools shown below 2 Cut a strip of template paper to lay over the 4 Cut out the template hole and trial fit as muffler pipes and tape to bottom of fuse as shown Ensure there is adequate clearance all shown below around the muffler pipes as shown 57 5 Cuta strip of template paper to lay over the 7 Remove the muffler and the glow plug if glow plug and tape to side of fuse as shown needed from the engine below 6 Mark the location of the glow plug on the tem 8 Install the cowl and secure with all four cowl plate paper Cut a hole large enough to insert mounting screws as shown the glow plug battery igniter through the cowl around the glow plug location Note Take care not to move or loosen templates from fuse Note Ensure engine is centered in cowl If needed small adjustments can be made by loosening the engine mounting bolts and moving the engine up or down If adjust
31. proved flying sites Follow all in structions included with your plane radio and engine Aeroworks manufacturing guarantees this kit to be free from defects in both material and workman ship at the date of purchase This warranty does not cover any component parts damaged by use or modification In no case shall Aeroworks liability exceed the original cost of the purchased kit Fur ther Aeroworks reserves the right to change or modify this warranty without notice In that Aeroworks has no control over the final assembly or materials used for final assembly No li ability shall be assumed nor accepted for any damage resulting from the use by the user of the final user assembled product By the act of using the user assembled product the user accepts all resulting liability SHIPPING DAMAGE Aeroworks has taken extreme steps to prevent your model from possible shipping damage However shipping damage may still occur If your model is received with any damage as the result of shipping it is important that you retain both the inner white and outer brown boxes and notify Aeroworks IMMEDIATELY for further steps to process your claim Failure too comply may result in the inability to process your damage claim We as the kit manufacturer have provided you with a top quality thoroughly tested kit and detailed instructions but ultimately the quality and fly ability of your finished model depends on how you build it therefore we cannot in
32. r hinging Clear sure the connectors will not come apart from Covering is supplied for sealing the hinge gaps if vibration or light tension desired However due to the precisely aligned and minimal hinge gap this step is optional Gather one aileron servo one 6 servo exten sion and servo mounting screws as shown be low to begin the servo installation Note Recommended Servo Requirements min 140 in oz Digital Metal Geared 2 Attach the servo extension to the aileron servo as 4 Layout the servo and extension on the wing to shown below test fit the installation and ensure servo lead is the correct length II 5 Remove the balsa stick with the pull string a Install the servo in servo well with the output from the servo well Fasten the pull string shaft toward the leading edge of the wing from the servo hole to the male connector of Mark locations of servo mounting holes Use the servo extension a 1 16 bit to drill servo mounting holes 6 Draw the servo extension through the wing 8 Install servo with servo mounting screws and pull through the wing root rib as shown 12 9 Align the control horn over the factory drilled II Secure using four wood screws as shown holes Note Ensure arm of control horn faces towards root end of aileron Refer to picture Z7 10 Use thick CA on each screw prior to installing Aileron Control Linkage Installation to lock screw
33. s aerobatic aircraft IMPORTANT Please read through this assembly manual carefully before starting the as sembly of your new 90 1 20 YAK 54 ARF QB Inventory and inspect all parts and hard ware for any imperfections or damage Please notify Aeroworks immediately if there are missing or damaged parts INTENDED USE This plane should not be regarded as a toy This is an aerobatic plane and 1s recommended for pilots who are beyond the trainer stage and are comfortable with flying an aerobatic sport plane READ WARRANTY READ It is important to notify Aeroworks of any damage or problems with the model within 30 days of receiving your airplane to be covered under warranty If you wish to return this air craft for any reason a 15 restock fee will be charged to the customer In addition the cus tomer is responsible for all return shipping cost and all prior shipping cost will not be re funded Parts will be exchanged or replaced once the original item is returned at the owner s expense If you have any problems or questions please contact Aeroworks Aeroworks cannot insure the skill of the modeler and cannot influence the builder during the construction or use of this aircraft and therefore will not be accountable for any property damage bodily injury or death caused by this aircraft Aeroworks cannot insure the skill of the modeler and cannot influence the builder during the construction or use of this aircraft and therefore The p
34. s as shown Note Only four 8 flat washers have been supplied with your model 9 Install the engine onto the engine mounts Use flat washers between the bolt head and engine and the engine mount and nuts Tighten firmly C amp o V A A A 12 1 N lt Two Stroke Throttle Servo Installation 1 Gather the throttle servo and throttle servo mounting hardware as shown below 1 2mm x 300mm One end threaded pushrod 1 3 5mm x 400mm plastic guide tube 1 nylon clevis 1 plastic quick link 2 plywood support braces 1 servo mounting tray Note The plywood servo mount is not used for the two stroke throttle installation 2 Mark the location of the throttle pushrod exit 4 Install the RC link onto the pushrod with stop hole on the firewall Ensure the pushrod will nut as shown not bind on the firewall engine mount or engine when installed Note Pay close attention to the location of the fuel tank and make sure when fuel tank is installed it will not interfere with the throttle pushrod 3 Use a drill to drill the pushrod exit hole into 5 Insert the throttle pushrod through the firewall the firewall as shown Connect the RC link to the engine carburetor throttle arm Use pliers to make a 90 Z Bend just aft of the engine cylinder head to clear the muffler manifold 47 6 Remove the throttle pushrod and complete the 8 Install the throttle servo into the ser
35. s in place 1 Gather the aileron control linkage parts as shown Note CA glues have a fast drying time below There is one 4 40 pushrod with RC link and nuts 4 40 ball link assembly 4 40 bolt Remember to work quickly brass spacer and lock nut 13 4 Correct installation of ball link and brass spacer to servo arm shown below 2 Assemble the pushrod assembly as shown Improperly installed servo linkages can cause servos to strip and ailerons to flutter Aileron flutter can and will destroy your model instantly Lock Nut 3 Install the servo arm to the ball link as shown 5 Install the servo arm toward the wing root as Note We recommend using a 1 or 1 1 4 servo shown arm for best results Fhe 110111 We 14 6 Adjust the linkage so the servo arm is perpen dicular to the servo when the aileron is in the neutral position as shown Note The control horn has been positioned at a slight offset to provide the best performance and control at full deflection 7 Attach the RC link to the center hole on the con trol horn as shown Repeat the above steps for the other wing 15 STAB AND ELEVATOR ASSEMBLY Elevator Control Horn Installation 3 Use thick CA on each screw prior to installing to lock screws in place 1 The elevators have been pre hinged and glued to the stabs and are ready for flight No other Note CA glues have a fast drying time steps are necessary for hinging Clear
36. st airplanes due to reversed ailerons Right roll is right up left down Left roll is left up right down Batteries Transmitter and receiver batteries are fully charged Fasteners Check all wing bolts hatch bolts servo screws control horn bolts wheel collars and clevis keepers are tight and secure Use Loctite were necessary Covering Check all seems and overlaps are secure and have not lifted If any air gets underneath the covering it may pull the covering away form the plane and can cause the model to crash Always check before each flight A roll of clear tape in you flight box can be used for any field repairs Once you get the model back to your work shop use heat and or Thin CA glue to secure covering Radio Check trims and sub trims are set to neutral and controls centered Check rate and condi tion switches set properly Check the receiver antenna is fully extended and not reversed on it self Check radio antenna is fully telescoped Fuel Fill the fuel tank before each flight 74 Aerobatics The 90 1 20 YAK 54 QB is capable of any aero batic maneuver After you gain some confidence and little experience flying the airplane you can cut loose and perform any maneuver you can think of Here is a list of some of the more popular aerobatic and 3D maneuvers you can try Loops and rolls Knife edge flight Stall turns Snap rolls 2 4 and 8 point rolls Slow rolls Spins upright and inverted Flat Spins
37. stroke throttle push rod inside the fuse 2 Engines are side mounted Install the engine mounts as shown below The large webbing on the engine mounts goes toward the cylinder head of the engine 44 3 Use a drop of blue Loctite on the engine 5 Adjust the width of the engine mounts to fit the mounting bolts before installing width of the engine used Use a small C clamp and clamp the engine to the engine mounts as shown Adjust the engine mounts evenly so the mounting bolts are centered in slots of engine mounts then final tighten the engine mounting bolts into the firewall Note The required distance from the front of the firewall to the front of engine prop hub Back of spinner is 5 11 16 as shown below SIRO eee 4 Screw the engine mounting bolts all the way in 6 Mark the center of each engine mounting hole but DO NOT tighten yet with a center marking tool or beveled pencil or pen Ensure the mark is in the center of the en Note The engine mounts have been designed to be gine mounting hole adjustable to fit a wide range of engines Note We recommend the Great Planes Dead Center Engine Mount Hole Locator Part GPMR8130 45 7 Use a drill bit to drill the engine mounting holes in the engine mounts as shown Ensure the drilled holes are perpendicular to the en gine mounting surface 8 Gather the 4 8 32 x 30mm Hex Head engine mounting bolts 8 8 flat washers and 4 8 32 Lock nut
38. to the fuse floor II Apply baby powder or corn starch to receiver using the nylon tie wrap antenna wire to assist getting it into the an tenna guide tube 10 Cut off excess nylon tie wrap as shown 12 Insert the receiver antenna into the pre installed antenna tube as shown 63 15 Use a piece of supplied foam rubber to form a 13 Position receiver behind the batteries on the receiver mounting pad and place the receiver fuse floor as shown on the foam Secure the receiver to the fuse floor using a nylon tie as before Cut off ex cess nylon tie LTG Si pj _ 1 2400Man ex 1 3 t iu TNILM iOm Barrericg z sv Attach all servos battery regulator and 14 Tape the receiver antenna wire to the end of 16 switch leads to the proper connectors the antenna guide tube as shown This will prevent the antenna wire from vibrating back out A typical radio installation is shown below 64 PRE FLIGHT PREPARATION 1 Gather the 4 4 40 cowl mounting bolts and 3 _ Gather the 2 8 32 wing mounting bolts 2 4 6 small rubber backed washers 8 large rubber backed washers and 4 hair pins Note Always check wing attachment bolts are securely tightened We recommend using hair pins through the aluminum anti rotation dowels for a second method of security Use hair pins through anti rotation dowels for second method of wing attachment 2 Mount the cowl using the
39. upright and inverted Harriers upright and inverted Water falls Torque Rolls Rolling circles Rolling harrier The sky and your imagination are you only limits FLY and ENJOY AEROWORKS World Class Aircratt 75 YAK 54 CUSTOMER NOTES 76
40. urchaser operator accepts all responsibility of any and all structural or mechanical failures KIT CONTENTS 90 1 20 YAK 54 ARF OB Basic Aircraft Parts Fuselage vertical fin installed pre drilled for the hinges covered firewall fuel proofed muffler tunnel pre painted pre drilled for mounting of the tail wheel assembly 4 8 32 blind nuts installed in firewall for mounting of the engine mounts 4 8 32 blind nuts installed for main landing gear 4 4 40 blind nuts installed for the mounting of the stab 4 4 40 blind nuts installed for the mounting of the cowling 1 Gear cover for the landing gear covered installed by 2 T2 6x12mm PWA screws 1 Canopy base painted installed on the fuselage by 4 4 40 blind nuts and 4 4 40x10mm hex style bolts 1 Tinted Canopy glued on the canopy base and painted 4 6 bonded washers for the mounting of the canopy base 4 3mm split lock washers for the mounting of the canopy base 1 3 5 o d x 750mm Antenna guide tube installed 2 3 5 o d x 70mm rudder pull pull exit tubes installed Left Wing with Aileron covered hinges installed and glued Pre drilled for the mounting of the control horn 1 8 32 blind nut installed for the wing mounting 2 Aluminum anti rotation dowels installed pre drilled hole for cotter pin installation 6 pin point hinges glued Read to fly 1 Aileron servo pull string installed Right Wing with Aileron covered hing
41. ve free and full travel of each hinge 20 5 Mix epoxy in mixing cup and use a tapered 7 Ensure there is minimal to no gap between fin stick to apply the epoxy inside the pre drilled and rudder Allow epoxy to fully cure holes in the leading edge of the rudder Apply epoxy onto each hinge Note Ensure you have full rudder deflection before epoxy fully cures Rudder Servo Installation 6 Carefully slide the rudder onto each hinge and against the trailing edge of the fin Wipe away 1 i Gather the rudder servo double servo arm and excess epoxy with alcohol wetted wipes mounting screws as shown Note We recommend using a 2 to 3 servo arm for best results Note Recommended Servo Requirements min 180 in oz Digital Metal Geared 21 2 Install the rudder servo into the rudder servo 4 Install rudder servo with servo screws mounting tray with the servo output shaft toward the tail 3 Mark and use a 1 16 bit to drill the rudder Rudder Pull Pull Cable Installation servo mounting holes 1 Gather the rudder control linkage parts shown below 2 Rudder cables 4 brass swaging tubes 2 control horns one left one right 4 mounting screws each and 4 RC links with threaded couplers 22 2 Align the control horn over the factory drilled 4 Secure control horn using four wood screws as holes shown Repeat the above steps to install the other side rudder control horn Note Ensure arm
42. vo tray in Z bend as shown Make the bend approxi front of the wing tube as shown Mark the mately 1 2 wide to clear the muffler manifold position of the servo mounting holes Use a as shown 1 16 drill to drill the servo mounting holes 7 Reinstall the throttle pushrod and insert into 9 Install the throttle servo into the servo mount the pushrod exit hole as shown Ensure the using servo mounting screws throttle pushrod will line up with the engine carburetor throttle arm with no binding 46 10 Slide the nylon outer tube over the throttle 12 pushrod wire and forward through the hole in the firewall as shown Extend the nylon tube forward of the firewall approximately 1 2 Mark the nylon tube over the front of the throt tle servo mount as shown Reinstall the nylon tube over the throttle push rod Use needle nose pliers to bend the throttle pushrod wire 90 up over the trottle servo output arm hole as shown 11 Remove the nylon tube and cut at the mark as 13 shown Use wire cutters to cut off the excess pushrod wire above the throttle servo output arm hole as shown 49 14 Slide the plywood throttle pushrod support 16 Two stroke throttle pushrod installed with bracket over the nylon tube Mark the length clearance for the muffler manifold of the bracket inside the motor box Remove the bracket and cut to length Reinstall the bracket on the nylon tube and install the throt tle pushrod
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