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SUKHOI 31.

                                                                                  

Instruction Manual

12

Install the spinner backplate, propeller and

spinner cone.  The spinner cone is held in
place using two 3mm x 15mm wood screws.

2. While keeping the back edge of the

cowl flush with the marks, align the front of
the cowl with the crankshaft of the engine.  The
front of the cowl should be positioned so the
crankshaft is in 

nearly

 the middle of the cowl

opening.  Hold the cowl firmly in place using
pieces of masking tape.

4. Install the muffler and muffler extension

onto the engine and make the cutout in the
cowl for muffler clearance.  Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve.

3.

Slide the cowl back over the engine

and secure it in place using four wood screws.
See picture below.

Machine screw.

INSTALLING THE SPINNER.

Summary of Contents for SUKHOI 31 BH11

Page 1: ...CIFICATION Wingspan 1 400 mm 55 in Length 1 250 mm 49 in Weight 2 6 kg 5 72 Lbs Radio 04 channels Servo 05 servos Engine 46 2 Stroke 52 70 4 Stroke Instruction Manual book Made in Vietnam ITEM CODE BH...

Page 2: ...read lock Paper towels Some more parts HARDWAREPACK COWLING Landing gear To avoid scratching your new airplane do not unwrap the pieces until they are needed for assembly Cover your workbench with an...

Page 3: ...propeller Do not start the engine if people are near Do not stand in line with the side of the propel ler Make engine adjustments from behind the propeller only Do not reach around the spin ning prop...

Page 4: ...masking tape tape the servo lead to the end of the thread carefully pull the thread out When you have pulled the servo lead out re move the masking tape and the servo lead from the thread Electric wir...

Page 5: ...diameter the aileron using the control horn as a guide and screw the control horn in place 1 Using a ruler pen to draw a straight line as below picture 2 Locate nylon control horn nylon con trol horn...

Page 6: ...e 90 degree bend down through the hole in the servo arm Install one nylon snap keeper over the wire to secure it to the arm Install the servo arm retaining screw and remove the masking tape from the a...

Page 7: ...NUAL 7 3 Test fit the dihedral brace into each wing half The brace should slide in easily Remove covering Masking tape Apply masking tape Epoxy glue Aluminium brace Masking tape INSTALLING THE ENGINE...

Page 8: ...SUKHOI 31 Instruction Manual 8 INSTALLING THE STOPPER ASSEMBLY cut INSTALLING THE ENGINE MOUNT 3x20mm 4x25mm FUEL TANK...

Page 9: ...g knife cut one length of silicon fuel line the length of silicon fuel line is calculated by how the weighted clunk should rest about 8mm away from the rear of the tank and move freely inside the tank...

Page 10: ...y This Z bend should be inserted into the throttle arm of the engine when the engine is fitted onto the engine mount Fit the engine to the engine mount using the screws provided Do not secure the tank...

Page 11: ...SUKHOI 31 INSTRUCTION MANUAL 11 Secure Pushrod wire Trim and cut COWLING 1 Slide the fiberglass cowl over the en gine and line up the back edge of the cowl with the marks you made on the fuselage...

Page 12: ...of the cowl should be positioned so the crankshaft is in nearly the middle of the cowl opening Hold the cowl firmly in place using pieces of masking tape 4 Install the muffler and muffler extension on...

Page 13: ...ering from the fuselage for the stabilizer and remove it HORIZONTAL STABILIZER ELEVATOR INSTALLATION Elevator servo Remove covering 2 Draw a center line onto the horizontal stabilizer Then slide the h...

Page 14: ...asking tape or T pins used to hold the stabilizer in place and carefully inspect the glue joints Use more epoxy to fill in any gaps that were not filled previously and clean up the excess using a pape...

Page 15: ...Elevator control horn install as same as the way of aileron control horn Please see pic tures below Control horn of elevator 3mm x 40mm M3 lock nut Nilon control clasp Pen Bottom side ELEVATOR CONTRO...

Page 16: ...31 Instruction Manual 16 C A glue C A glue C A glue Top side Bottom side ELEVATOR PUSHROD INSTALLATION Elevator pushrod install as same as the way of aileron pushrod Elevator control horn Elevator pu...

Page 17: ...SUKHOI 31 INSTRUCTION MANUAL 17 C A glue Cut Bend Elevator servo Bend and cut after VERTICAL INSTALLATION Rudder servo Snap keeper...

Page 18: ...ing knife remove the covering from the top of the fuselage and the covering from over the precut hinge slot cut into the lower rear portion of the fuselage This slot accepts the lower vertical Control...

Page 19: ...de gree to the horizontal stabilizer Pen 6 When you are sure that everything is a aligned correctly mix up a generous amount of 30 minute epoxy Apply a thin layer to the slot in the mounting platform...

Page 20: ...stall as same as the way of aileron control horn Please see pic tures below Drill 6mm a hole of the mounting rudder control horn on to the rudder with 6mm diam eter Control horn of Rudder Pen Mark a h...

Page 21: ...xcess mate rial from the arm After installing the adjustable metal con nector apply a small drop of thin C A to the bottom nut This will prevent the con nector from loosening during flight Servo arm C...

Page 22: ...foam to protect them from vi bration Use a rubber band or masking tape to hold the foam in place 3 Position the battery pack and receiver behind the fuel tank Use two tie wraps to hold the battery and...

Page 23: ...l a hole Trim 3 Using the hardware provided mount the main landing gear to the fuselage 2 A drop of C A glue on the wheel collar screws will help keep them from coming lose during operation Repeat the...

Page 24: ...ING THE TAIL WHEEL BRACKET 2 Using a pen mark the locations of the two mounting screws Remove the tail wheel bracket and drill 1mm pilot holes at the loca tions marked 3 Secure the tail wheel bracket...

Page 25: ...cal that your airplane be bal anced correctly Improper balance will cause your plane to lose control and crash THE CENTER OF GRAVITY IS LOCATED 100 115mm BACK FROM THE LEADING EDGE OF THE WING 2 Mount...

Page 26: ...heavy and you must add weigh to the nose If the nose drops it is nose heavy and you must add weight to the tail to balance If possible first attempt to balance the model by changing the position of t...

Page 27: ...SUKHOI 31 INSTRUCTION MANUAL 27...

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