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horns. Mount the control horn using 2-56 x 3/8" [9.5mm]
machine screws and the nylon backing plate on the bottoms
of the ruddervators. Note: Turning a 2-56 tap through the
back plate holes makes it easier to get the screws to thread
into the back plate.

❏ 

7. If you removed the V-tail from the fuse, reinstall it.

Thread a clevis 15 full turns onto two of the 17-1/2" [445mm]
pushrods.

❏ 

8. Trim the covering from the pushrod tube exits that are

in front of the V-tail on top of the fuse.

❏ 

9. Slide the 17-1/2" [445mm] pushrods into the guide

tubes in the fuse. Connect the clevises to the outer hole on
the control horns. With the elevators centered, mark the
pushrods where they cross the V-tail joint.

❏ 

10. Remove the pushrods. Make another mark 1-1/2"

[38mm] in front of the first. At the forward mark make a slight
bend. Reinstall the pushrods and attach the clevises. Note:

This bend is to make the pushrod move as freely as
possible in the pushrod tube. It may take several small
adjustments to get friction-free movement. It is worth the
effort, so take your time until there is no friction.

The engine mounting holes in the firewall fit both the
included  universal aluminum engine mount and the
engine mount that comes with the Nelson .40 Quickee
500 engine.

The included engine mount will fit most .25 – .46 size engines.
The bolt pattern of the mount is that of the Nelson .40. This
is to make it easy to upgrade to the Nelson, or experiment
from engine to engine.

❏ 

1. Remove the bolts from the engine backplate. Test fit

the mount to the engine. If necessary, file the mount to
accommodate the needle valve (required if using the O.S.

®

.46 FX), or relocate the remote needle to the engine
mounting lug (required for the O.S. .40 LA), as shown in the
photographs.

Mount the Engine

FINAL ASSEMBLY

10

Summary of Contents for Viper 500 ARF

Page 1: ...buyer is advised to return this kit immediately in new and unused condition to the place of purchase IMPORTANT NOTE This model is designed for sport flying and AMA Quickie 500 racing We will not quot...

Page 2: ...an fly at reasonable speeds until your confidence and skill are up to their full speed adrenaline rush The Viper 500 ARF is designed for sport flying and AMA Quickie 500 pylon racing competition accor...

Page 3: ...y connection of throttle and aileron servos FUTM3910 Switch Standard with heatshrink to secure to battery Servos 4 3 requiring 35 oz in of torque Servo recommendations The Viper 500 ARF is designed to...

Page 4: ...ecommended that you use only 30 minute or 45 minute epoxy because you will need the working time and or the additional strength Photos and sketches are placed before the step they refer to Frequently...

Page 5: ...lick on Where to Buy If this kit is missing parts contact Great Planes Product Support Replacement Parts List Order Number Description How to Purchase Missing pieces Contact Product Support Instructio...

Page 6: ...mount wing GPMQ3046 4 6 32 x 1 4 Bolts for main landing gear GPMQ3024 5 2 x 3 8 Screws to mount servo tray and hatch GPMQ3820 1 2 Washers to mount servo tray and hatch GPMR3400 1 2 x 9 CA Hinge Strip...

Page 7: ...photo the aileron torque rods protrude from the bottom of the wing cut the covering from the servo opening and the bottom of the four wing bolt holes Turn the wing over and cut the covering from the...

Page 8: ...A to the top and bottom of each hinge Do not use CA accelerator Gently work the aileron up and down while the glue hardens After the CA has fully hardened test the hinges by pulling on the ailerons 1...

Page 9: ...me as you did with the wing Permanently attach the ruddervators to the V tail the using the same hinging technique used with the ailerons 2 Bolt the V tail to the fuse with two 8 32 x 1 1 2 38mm flat...

Page 10: ...make a slight bend Reinstall the pushrods and attach the clevises Note This bend is to make the pushrod move as freely as possible in the pushrod tube It may take several small adjustments to get fri...

Page 11: ...hole in the mount as a guide to drill a 3 16 4 8mm hole through the firewall Note It is okay if you drill through a portion of the factory installed blind nut on the back of the firewall Remove the m...

Page 12: ...uselage in the approximate location of the fuel lines from the tank Remove the tank Drill 1 4 6mm holes for the fuel lines Harden the wood around the holes you just drilled with thin CA 12 Guide a 12...

Page 13: ...der Modifications on page 16 1 Trim the servo tray to fit your servos 2 Glue the V tail servo supports to the servo tray The side you glued the supports onto is now the bottom Note If you used servos...

Page 14: ...A 8 Lift the plastic antenna tube up through the servo tray Reinstall the receiver and receiver battery 9 Remove the covering from the antenna tube exit at the rear of the fuse 10 Using an arm cut off...

Page 15: ...20 Secure the front of the hatch with a 2 x 3 8 9 5mm screw and 2 washer 21 Determine the size of the throttle servo you are going to use Using the photos as a reference mount the throttle servo in th...

Page 16: ...e modifications are recommended only if your radio does not have V tail mixing 1 Cut the tail of the fuse off 1 4 6mm behind the tail skid 2 Remove covering from the rudder 3 Glue 1 4 x 1 2 x 1 1 2 6...

Page 17: ...dervator pushrod as shown Connect the two ruddervator pushrods together with two 5 32 4mm wheel collars 15 Attach the rudder pushrod to the right hand servo with the Faslink as done with the other ser...

Page 18: ...f the systems in place including the engine landing gear covering and paint and the radio system More than any other factor the C G balance point can have the greatest effect on how a model flies and...

Page 19: ...eight to fall off Use 2 sheet metal screws RTV silicone or epoxy to permanently hold the weight in place 4 IMPORTANT If you found it necessary to add any weight recheck the C G after the weight has be...

Page 20: ...an assistant holding the model using hand signals to show you what is happening If the control surfaces do not respond correctly do not fly Find and correct the problem first Look for loose servo con...

Page 21: ...hasn t been cut shortened or otherwise damaged 5 Balance your model laterally as explained in the instructions 6 Use thread locking compound to secure critical fasteners such as the set screws that h...

Page 22: ...rface flutter Because flutter can quickly destroy components of your airplane any time you detect flutter you must immediately cut the throttle and land the airplane Check all servo grommets for deter...

Page 23: ...to be aware of the relationship between a race model s airspeed and the responsiveness of its flight controls A flight plan greatly reduces the chances of crashing your model just because of poor pla...

Page 24: ...____________ Where Purchased _________________________ Date Construction Started __________________ Date Construction Finished _________________ Finished Weight __________________________ Date of Firs...

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