P-39 Airacobra Specification: Length: Wing span: Wing area: Wing loading: Flying weight: Radio: Engine: 7mm(70. ) 00mm(0.3 ) 7.5sq.dm(.5sq.ft) 93g/sq.dm(30.5oz/sq.ft) 7.3kg(.bs) ch & servos 30cc gasoline engine INSTRUCTION MANUAL SAFETY PRECAUTIONS This R/C airplane is not a toy! (The people under years old is forbidden from flying this model) First-time builders should seek advice from people having building experience.if misused or abused,it can cause serious bodily injury and damage to property. Fly only in open areas and preferably at a dedicated R/C flying site. We suggest having a qualified instructor carefully inspect your airplane before its first flight.please carefully read and follow all instructions included with this airplane,your radio control system and any other components purchased separately.
channel radio for aiplane is highly recommended for this model. -cycle.0 9 Optional parts: rubber wheel with metal hub. Spinner X0 We strongly recommen you use the thread lock for all the screws when you build your model.
Three wheel retract system Make sure to assemble retracts as instructed below. Rod (x300mm) TP Screw (.3xmm) Screw (3x0mm) Servo tray(.5x5.5xmm) Wooden Block(0x0xmm) Pin hinge(xmm) Washer(3x5mm) Washer(3x5mm) 3 Assemble the aileron to main wing with instant type AB glue. Be careful to ensure the moving parts of the hinges are able to move freely. Securely glue together. If coming off during flights, you 'll lose control of your airplane which leads to accidents! Strut 3-way pressure inlet 3-way pressure inlet Apply instant AB glue to aileron and pin hinge. Pin hinge(xmm) Install the servo as the illustration below Strut 3-way pressure inlet 3-way pressure inlet Strut Air inlet 3-way pressure inlet Air tank Make sure hinges are mounted in the same line. Quick release connector Pressure reduction inlet Quick release connector Ø0.mm Keep some space about mm width between aileron and trailing edge. 5 Install the nylon control horn and connect the linkage. Ø.7mm Switch Trailing edge Rod (x300mm) Aileron Air valve The status when the gear up Please insure the sealing of the retract system before flight. Pleas notice the inner diameter for each side of the pressure reduction inlet. Air valve Pull out length of mm to make gear down TP Screw(.xmm) Rod (X300mm) Strut ( 90 ) Switch Air line (3000mm) 3-way pressure inlet Air tank Air inlet Quick release connector Strut ( 90 ) 5 Make sure they are in the right position while installing. mm Screw (x0mm)
Secure and connect the servo.install the linkage. the nylon control horn Keep some space about mm width between trailing edge and flap. 7 The centre of the Gravity. TP Screw (.3xmm) TP Screw (.3xmm) Trailing edge Rod (x300mm).5mm Flap Screw (x0mm) Washer(3x5mm) Washer Screw (3x0mm) 3mm Make sure they are in the right position while installing. mm 50mm 9 Epoxy the flaps to the wings as illustration. Rod (x300mm) TP Screw (.3xmm) Screw (3x) Servo tray(.5x5.5xmm) Wooden Block(0x0xmm) Pin hinge(xmm) Washer(3x5mm) Washer(3x5mm) Securely glue together. If coming off during flights, you 'll lose control of your airplane which leads to accidents! 7 Epoxy the pin hinges to the flap. 0 Install the servo as the illustration below Pin hinge(xmm) 5
70 Epoxy the landing gear to the wing steadily. 73 Adjustment. Install the nylon control horn and connect the linkage. 3 Mount the gear door and the wheel to the retract. Rod (x300mm) Bushing (Xmm) Wheel (00mm) Side View inside LockNut(mm) RUDDER 0mm Screw (x0mm) 0mm Note:rubber wheels oleo struts and retracts are optional. Top view 7 Install the wheel to the fixed landing gear. 7 Adjustment. Secure the servo.install the nylon control horn and connect the linkage. Cut away the surplus parts of plastic cover carefully along the shaded line. TP Screw (.3xmm) ELEVATOR Top view.5mm TP Screw (.3xmm) Rod (x300mm) 5mm 3mm Screw (x0mm) Washer(3x5mm) Side View Washer Collar 5mm 3 Centre of Gravity. Position for right diagram. Screw (3x) 7 Epoxy the fixed landing gear to the relevant position in the fuselage. 75 Adjustment. 5 Trim the covering for assembling the wheel well carefully. Side View AILERON FLAP AILERON FLAP 0mm Wheel (00mm) Bushing (xmm) LockNut (mm) TP Screw (3x0mm) Washer (3xmm) Wood dowel (x) Wood dowel (x50mm) PVC part Main wing joiner Rib template (mm ply) Screw(x50mm) Blind Nut (mm) Reinforcement Plate 3
Epoxy the wheel house to the wings carefully. 9 According to the rib template drill holes in one wing and epoxy wood dowel in them. Rib template (mm ply) Wood dowel (x) Main wing joiner 5 Epoxy plies to relevant position inside the fuselage as below for assembling the cowling. TP Screw (.3xmm).5mm Epoxy the exhaust to appropriate position in the fuselage as illustration. mm Rib template (mm ply) Main wing joiner Note:Please fix the air tube before assemble the wheel house to the wing. Wood dowel (x) TP Screw (.3xmm) Ply (5x5x3mm) Pvc part 7 Assemble the landing gear to the wheel house. 0 According to the rib template drill holes to another main wing. Cut the surplus shaded portion carefully off the canopy and exhaust..mm Washer (3xmm) TP Screw (3x0mm) TP Screw (3x0mm) Washer (3xmm) Rib template (mm ply) mm Wheel (00mm) Wooden supporter (.5xxmm) Landing gear(5mm) TP Screw (3x0mm ) Landing gear straps Wooden Block(x0xmm) Wooden Block(x5xmm) 7 Wheel (90mm) Wooden supporter (xxmm) Landing gear(5mm) TP Screw (.3xmm) Aluminum part(0xmm) Gear door The sketch map when the main wing assembled completely. Trim holes in the appropriate position in the wings and drag the servo wire and the air tube out. 7 Epoxy plies inside the fuselage under the cowing and mount the canopy with TP screw as illustration. 9 Assemble the wheel and gear door to landing gear. Make sure to glue securely. If not properly glued, a failure in flight may occur. Securely glue together.if coming off during flights, you'll lose control of your airplane which leads to accidents! For air tube 0mm R0mm TP Screw (.3xmm) TP Screw (3x0mm) TP Screw (3x0mm) Washer (3xmm) A A` For servo wire 00mm R0mm Wooden Block A=A' TP Screw (.3xmm).5mm Ply (5x5x3mm) Wooden supporter 3
0 Install the servo. The servos installation finished sketch map. Epoxy the main wing hardly together with wing joiner. 3 5 Assemble the wings to the fuselage with screw and blind nut as below. Screw (x0mm) Ball joint Washer(x5mm) Lock Nut (mm ) Throttle servo Elevator servo.mm Steel wire Nose wheel servo Blind Nut Screw(x50mm) Screw (x0mm) Nut (mm ) Washer(x5mm) switch servo Rudder servo Securely glue together. If coming off during flights, you 'll lose control of your airplane which leads to accidents! Screw(x50mm) Blind Nut (mm) Reinforcement Plate Reinforcement Plate Mount the servo of nose wheel to the fuselage. 3 Drill holes to appropriate position in the front of mid wing and epoxy wood dowel in them. Canopy TP Screw (.3xmm) Ply(5x5x3mm) Pvc part 0mm Wood dowel (x50mm) mm Wood dowel (x50mm) Blind Nut (mm) Screw (x35mm) Screw (x5mm) Washer(xmm) Spring Washer (mm) Nut (mm) Linkage Stopper Plastic tube (x50mm) Engine mount (x05mm) Fuel tank (550cc) Install the servo of switch. Trim the cowling for engine and muffler. Drill holes to relevant position in the fuselage. The front view of the engine installation finished. mm mm 0mm In case of -cycle & -cycle engine. 5
7 The side sketch map of the engine installation finished. mm 30 Assemble the accelerator push rod to the engine. Set Screw (3xmm) Linkage Stopper Washer (mm) Washer (xmm) Rod (x50mm) 55 Install the rudder servo to appropriate position in the fuselage. 5 Assemble the wheel and oleo strut to the retract as illustration. Screw (x5mm) Washer(xmm) Brass collar (5mm) Wheel (75 mm) Aluminum shaft Brass collar (5mm) Screw (x5mm) Set Screw (mm) Set Screw (mm) Set Screw (3xmm) Note:rubber wheels oleo struts and retracts are optional. Steering fullarm (0xmm) Washer(xmm) Screw (x5mm) Washer(xmm) Aluminum shaft(5x50mm) Steering fullarm (0xmm) Wheel (75 mm) Drill holes and set blind nut in appropriate position in the firewall before install the engine. 3 Engine installation finished sketch map. 5 The sketch map of the linkages for the rudder and elevator in the fuselage. 59 Assemble the retract to the fuselage with TP Screw as illustration. TP Screw(3x0mm) Elevator servo 5.mm Blind Nut Rudder servo.mm Blind Nut (mm) TP Screw(3x0mm) 9 Install the engine carefully. Screw (x35mm) 3 Assembly of the fuel tank. 0 Assemble the steel wire to the nose arm. Washer (xmm) Washer (xmm) Spring Washer (mm) Nut (mm) mm Washer (xmm) Screw (x5mm) Air pressure line Fuel spray line Fuel supply line wheel (90mm) Bushing (Xmm) Lock Nut (mm ) TP Screw(3x0mm) Air tank Switch Rod (x300mm) Steel wire (0.5x500mm) Screw (x0mm) Nut (mm ) Washer(x5mm)
Keep the tailing some edge space and about the rudder. mm width between The sketch map after the rudder shaft assemble finished. Mount the fuel tank to the fuselage. 9 5 50 5 Tailing edge Rudder Make sure they are in the right position while installing. Cut away the rubber tube when the epoxy glue dried. mm Drill holes to the relevant position in the tailing edge and epoxy the rudder to them..5mm Drill a small hole to appropriate position in the fuselage for installing the plastical tube and a hole in the rudder for assembling the rudder shaft. 53 5 Steel wire Aluminum tube Washer(3x5mm) Washer(3x5mm) Screw (3x0mm) Steel wire (0.5x3000mm) The sketch map of the linkage for the rudder and the tail wheel. Install the servo. Screw (3x0mm) 33 Note: Customers can choose nylon stabbing fix the tank, We don t suppty nylon stabbing. 3 Install the servo. Set screw (3xmm) Washer (mm) Linkage Stopper Washer (mm) Washer (mm) Nut (mm) Set screw (3xmm) Assemble position in the the throttle fuselage. servo to appropriate 35 37 3 B Assembly of the stabilizer. Pin hinge(xmm) U-style wire (50x5mm) Steel wire (0.5x3000mm) Matal douel (x) Make sure to glue securely. If not properly glued, a failure in flight may occur. Securely glue together.if coming off during flights, you'll lose control of your airplane which leads to accidents! Temporarily fasten down the main wing and check its correct position. A Rib template (mm ply) Stab joiner (x) Screw (x0mm) Nut (mm ) Washer(x5mm) Plastical tube(3x) A' B' A=A' B=B' Set the U-style wire through the enlargd hole as below. Plastical tube(3x) Screw (x0mm) Washer(x5mm) Ball joint Lock Nut (mm ) Steel wire 75mm 90mm 3mm Screw (x0mm) Nut (mm ) Washer(x5mm) Steel wire (0.5x3000mm) U-style wire (50x3mm) 0 7
3 According to the rib template drill holes to the tail of fuselage and assemble the "U"style wire as illustration. Trim slot to appropriate position in the stabilizer. Glue the elevator to the stabilizer by CA and epoxy. 7 Connect the elevator and the serer via the steel wire. mm x0mm Rib template (mm ply) Stab joiner (x) Elevator servo Stab joiner (x) Rib template (mm ply) Securely glue together. If coming off during flights, you 'll lose control of your airplane which leads to accidents! Drill and epoxy two holes the at wood the dowel stabilizer in them. root base via rib template 39 Apply instant type CA glue to elevator and pin hinge. 5 Install the servo. Rib template (mm ply) mm Wood dowel (x) Wood dowel (x) Pin hinge(xmm) Make sure hinges are mounted in the same line. 3mm Screw (x0mm) Washer(x5mm) Ball joint Lock Nut (mm ) Steel wire Screw (x0mm) Nut (mm ) Washer(x5mm) Pin hinge(.5xmm) Steel wire (0.5x3000mm) Washer(3x5mm) Screw (3x0mm) Plastical tube(3x) Screw (x0mm) Nut (mm ) Washer(x5mm) 3 0 Assemble the stabilizers carefully to the fuselage. 3 Keep some space about mm width between elevator and tailing edge. Assemble the elevator sever to appropriate position in the fuselage. Drill holes to appropriate position in the rudder and epoxy the ping hinges in them Tailing edge.5mm Elevator 0mm mm 5mm Securely glue together. If coming off during flights, you 'll lose control of your airplane which leads to accidents! Make sure they are in the right position while installing. Make sure hinges are mounted in the same line. Pin hinge(.5xmm) 3 9