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arf YAK55M 60CC, Instruction Manual, Page: 37 / 53

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arf YAK55M 60CC Instruction Manual Download Page 37

 

 

 

 

       

 

ENGINE, EXHAUST, & FUEL SYSTEM   

1. The newly released Yak55M 60cc is desinged to accommodate twin gas engine. 

 

 

2.Templates are provided in the kit for both DA and 3W 50 cc engines as well as the DA 60 engine.    Select 
the proper guide for your engine and mark and drill the mounting holes and cut out the center as indicated.   
Notice that the engine center line is offset to the left to compensate for the right thrust built into the engine 
box.     

Summary of Contents for YAK55M 60CC

Page 1: ...ARF MODEL YAK55M 60CC Instruction Manual ...

Page 2: ... 7 This YAK new design with a longer fuselage moment arm aiding the tracking of the model giving it rock sold precision flight Making it perfect for modern day flight schedules for IMAC and Freestyle competitions 8 Pocket Style Scale Hinging 9 The YAK is designed to directly accommodate KUZA rudder servo tray 10 Including New KUZA Fuel Tank Assembly with aluminum tank cap A QUICK WORD ABOUT SAFETY...

Page 3: ...uarantee that the plane is in perfect condition at purchase The warranty will be voided after modifications and usages If you have any questions or find any issues please contact the distributors in your area SPECIFICATIONS WING SPAN 91 2310mm LENGTH 89 2260mm WING AREA 1500sq in 96 8sq dm FLYING WEIGHT 17 18 5lbs 7700 8400g ENGINE 50 70cc gas DLE55 DLE61 DA50 DA60 GP61 Electric Power Hacker Q80 8...

Page 4: ...PVC canopy Pocket Style Scale Hinging Larger aileron and elevator design for excellent 3D aerobatic flying Removable rudder Includes Side Force Generator s SFG ...

Page 5: ... CNC anodized aluminum Canopy Bolts Full length Tuned pipe tunnel designed into fuselage Adjustable pushrods for easy fine tuning Includes wrench ...

Page 6: ... Servo extension safety connector clips High performance cap head bolts Honeycomb board carton packing for safer transportation ...

Page 7: ... High quality 3mm ball links assembly New dual fiberglass horn assembly ...

Page 8: ... Carbon fiber tail wheel assembly High quality durable rubber wheels Improved new Axles the material of the Axle is stainless steel ...

Page 9: ... Carbon fiber landing gear Increased diameter carbon fiber wing tube than previous V1 version Two Carbon fiber stab tube ...

Page 10: ... The YAK is designed to directly accommodate KUZA rudder servo tray New KUZA Fuel Tank Assembly with aluminum tank cap ...

Page 11: ...Scheme A Red White blue ...

Page 12: ...Scheme B Yellow black red ...

Page 13: ...ape measure Blue thread lock or equivalent Note As with all kits it s a good idea to read all the instructions and study the parts before you begin construction Handle the parts of this kit with care so you do not damage any of the structure or covering Inspect all the parts for any shipping damage and report any issues to as soon as you can Make sure you have a flat and sturdy workbench and follo...

Page 14: ...s using strips of appropriate covering or clear trim tape We have found this to be helpful with models intended for higher speed flight or models with unusually large hinge gaps aircraft utilize a very tight double beveled hinge line and do not normally require this step Sealing the hinge gaps is therefore left as an option for the modeler Please locate the accessories before assembly New Expoxy h...

Page 15: ...Make sure to sand the horns so the surface is rough to glue correctly Pushrods Bag No KA05CBG3 Four 3x61mm pushrods for ailerons One 3x125mm pushrods rudder Pull push style ...

Page 16: ...Pull pull assembly kits for the rudder Bag No KA05CD Ball link assemblies Bag No KAG00131 8 for ailerons and elevators 6 Servo extension safety connector clips Bag No KAG0021 ...

Page 17: ...Main rubber wheels Bag No KAG014B 2PCS New stainless steel Axle kits Bag No KA05CH 2PCS New Carbon fiber tail wheel assembly Bag No KAG0104 ...

Page 18: ...m ALU canopy bolts 12mm PTFE washers Bag No KAG0043 Side force generators Four 3x20mm Hexagon bolts 4 Washers Bolts for landing gear 4 4x20mm hex bolts and 4 M4 stainless steel self locking nuts 4 washers ...

Page 19: ...Bolts washers for cowl 4 3x16mm Hexagon bolts and 2 10mm PTFE washers and 2 wsahers 4 allen keys Bag No KA05CE Bolts washers for stab tails 4 3x12mm Hexagon bolts and 4 10mm PTFE washers ...

Page 20: ...eron push rod linkage set 3x61mm Pushrods for aileron 2 It is much easier to install the twin control horns before installing the wing Locate the fiberglass aileron control horns ball links and associated bolts and nylon insert lock nuts Use some fine sandpaper to ...

Page 21: ... full aileron deflection 5 Before gluing the hinges in you must first clean the hinges of any mold release agent using isopropyl alcohol We also recommend scuffing up the plastic with light sandpaper for maximum glue adhesion 6 Mix up some 30 minute epoxy and using a toothpick or small wooden dowel coat the inside of each hinge slot with epoxy Also put a thin layer of epoxy on one side of the hing...

Page 22: ...arm should be as close to perpendicular to the control rod as possible while the aileron is at neutral Double check all screws bolts and nuts to assure proper installation and operation without binding Once satisfied permanently attach the ball link to the servo arm with the supplied screw and nut 11 Check the final radio operation of the ailerons and make sure there is no binding or servo fightin...

Page 23: ...the covering where the horns are inserted and the area for the plate 3 Sand the area on the horn that will be glued inside the elevator 4 Using plenty of 30 minute epoxy fit the horn and plate into place Use a ball joint and bolt to hold the horn in place while drying ...

Page 24: ... to use for the elevators We recommend using KUZA 1 75 aluminium CNC servo arm sold separately for elevator control 6 Place the servo into the elevator and screw in place Remember to harden the holes with thin Cyano 7 Place the servo arm back onto the servo remembering to centre ...

Page 25: ...ce remembering one end is reverse threaded Set it so the arm is centered and the elevator is flat Choose the holes depending on how much deflection you require Rudder Assembly 1 Install the fiberglass control horns in the same way as you did the elevator horns ...

Page 26: ... through the brass tube and then loop it back through a second time Using a set of crimping pliers place three crimps just tight enough not to cut the brass tube but enough to securely hold the wire in place Cut off the excess cable with wire cutters Wick thin CA into the brass tube to help hold the cable secure Repeat for the other cable 4 Thread the couplers about half way into the ball links of...

Page 27: ... then feed the loose end back through the brass tube Loop the cable back through the brass tube as before and crimp the brass tube three times just tight enough not to cut the brass tube but enough to securely hold the wire in place Cut off the excess cable with wire cutters Wick thin CA into the brass tube to help hold the cable secure Repeat for the other cable Hint Once you have established the...

Page 28: ...tray and so will be all other pending ARF airplanes that are 60cc or greater 9 You will need to provide 3X42 mm push rods 2 Pcs and ball links 4 Pcs depending on the servo of your choice a KUZA 3 25 aluminum CNC servo arm may also be needed 10 Assembling rudder servo tray ...

Page 29: ......

Page 30: ...le for rudder Below is picture of pull push style linkage set Cut off excess fiberglass rudder horn and use sandpaper to roughen up the parts needed to inlay Use epoxy glue to glue the rudder horn Use 3X125mm push rod to connect to the horn ...

Page 31: ...heel assembly by installing the hollow hex bolt and lock nut into the large hole at the rear of the tail wheel bracket 2 Slide 3 wheel collars and the wheel onto the pre bent tail wheel wire and tighten in place with thread lock as shown below ...

Page 32: ...3 Install steering rod again the use of thread lock on any metal to metal screw is advised ...

Page 33: ...re the covering Then install the CF tail wheel bracket with M3 hex bolts and washers 5 Drill a screw hole on the bottom of rudder 200 220 mm away from the hinge line with 2 mm drill bit Secure one end of the wheel spring with a M3 12mm self threaded screw then hook the other end onto the steering rod ...

Page 34: ...6 Fully installed tail wheel assembly is shown below Main Landing Gear Installation 1 Locate the supplied main landing gear parts and sort them out on your workbench ...

Page 35: ... bolts Place the nuts in through the can tunnel opening with appropriate size spanner Remember the gear will rake forward 3 Loosen out the second nut then apply 30 minute epoxy glue on the axle Tighten the nut back in place allow at least 1 hours for threadlocker to dry ...

Page 36: ...a guide to leave a gap on the inboard of the axle Use a small drop of thread lock and tighten in place Slide the wheel onto the axle and install a second wheel collar also using thread lock on the set screw 5 Fit the wheel pant in place and install using the two supplied bolts Use thread lock to secure the bolts in place Repeat the above steps for the other main gear ...

Page 37: ...are provided in the kit for both DA and 3W 50 cc engines as well as the DA 60 engine Select the proper guide for your engine and mark and drill the mounting holes and cut out the center as indicated Notice that the engine center line is offset to the left to compensate for the right thrust built into the engine box ...

Page 38: ... stand offs mount your engine securely using bolts 20mm POM washers and locknuts The use of thread lock is also highly essential for the engine bolts 4 Mount the ignition module according to the manufacturer s instructions The best place to mount it is on the side of the engine box Secure the pickup lead and ignition wires with zip ties so that they do not vibrate or touch any hot part of the engi...

Page 39: ...in the bottom of the engine box for 50cc 70cc engines Mount your throttle servo and complete your linkage setup A hole will need to be drilled on the firewall to allow the pushrod to connect to the throttle arm on the carb 6 An extra servo can be fitted for choke or a mechanical linkage can be used ...

Page 40: ... small zip ties or fuel line clamps to secure the lines to the tank A barb on the bottom of the fuselage can be fitted for the vent 8 The YAK comes with canister pipe tunnel Standard muffler pitts muffler canister or tuned pipe can be fitted If a tuned pipe is going to be used the end of the can tunnel can be removed The tunnel can be closed off to accept canisters of all sizes or stock mufflers F...

Page 41: ...Canister Fitting Tuned Pipe Mounting ...

Page 42: ... come with covers that can be used for cooling Use a soldering iron to open up the holes COWLING INSTALLATION 1 With the engine fitted tape a piece of card to the bottom of the fuselage that can overlap the cylinder head Remove the engine and refit the cowl Then fold over the card to show where the cylinder head would be as below ...

Page 43: ...ved If it is still attached it may be beneficial to strengthen with a small amount of glass cloth If your exhaust outlet comes out within the cowl area then use the same method Depending on the amount of cooling required for your engine a template for louvers in the bottom of the cowl has been provided Use a dremel tool to remove the material ...

Page 44: ...ured with four 3 X 16mm bolts and washers Apply nutlock onto the bolts as the vibration from the gas engine will shake them come loose Labels are provided for aligning the drill holes for the cowl Stick then on without the cowl mark the hole Fit the cowl then press back down The hole will then show the area to drill Sere below ...

Page 45: ...ovide space to mount your switches just below the canopy Mount your switches according to the manufacturer s instructions and route your wires safely and securely as above 4 Your receiver battery s can be mounted in a variety of locations depending on your balance needs Regardless of where you mount your batteries it is vital that they are very secure with no possibility of coming loose Use double...

Page 46: ...nes and radio gear will dictate how you should install each The batteries can easily be located pretty much anywhere in the fuselage Note The best way to check your balance is to trim for level flight at about 1 2 to 3 4 throttle and then roll inverted The aircraft should maintain level flight with very little to no down elevator input If the aircraft climbs when inverted then you ve probably got ...

Page 47: ...our batteries are properly charged and all radio systems are in proper working order 2 Installation of Rudder Rudder is removable for convenience in transportation it is connected to fuselage by inserting a 3 mm fiber rod through the hinge line Then install pull pull ball links on control horns ...

Page 48: ...all the wings onto the fuselage being careful to align the wing tube with the wings and not force it The wing tube may be initially tight but will loosen some with use Guide your servo wires into the fuselage openings and connect to the proper aileron channels Servo clips are recommended Once you have the wings fully seated in the fuselage tighten the wing bolts inside the fuselage ...

Page 49: ... M3X20 cap head bolts and washers 6 Fill your fuel tank making sure your vent line is not plugged or capped With the canopy off this is a good time to check for any fuel leaks 7 Position the canopy in place and tighten ALU Canopy Bolts Be sure to use the supplied PTFE washers under the screw heads ...

Page 50: ...y give in the hinges Check all control rods ball links servo screws etc for proper operation and installation 10 Check your batteries and perform a proper range check once again with the engine off and running Be sure all surfaces are moving in the correct direction and the proper amount for your flying setup Recommend Accessories Not included KUZA 1x servo tray No KAG0T01 KUZA Heavy duty 7075 alu...

Page 51: ... 1 75in Single No KAG0S7F 100mm 4in Dual No KAG0D723F For Hitec servo 24T 47mm 1 75in Single No KAG0S7H 100mm 4in Dual No KAG0D73H For JR servo 23T 47mm 1 75in Single No KAG0S73J 100mm 4in Dual No KAG0D73J ...

Page 52: ... KUZA new Wingbag for 60CC Two color to choose red black blue silver No KAG0093 3 5in C F spinner Not Included ...

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