Zenoah TWIN GT80 Instruction Manual download pdf (Page 32)

Range Test Your Radio

Step 1. Before each flying session, be sure to range check your

radio. This is accomplished by turning on your transmitter with

the antenna collapsed. Turn on the receiver in your airplane.

With your airplane on the ground and the engine running, you

should be able to walk 30 paces (approximately 100 feet) away

from your airplane and still have complete control of all

functions. If not, don’t attempt to fly! Have your radio equipment

checked out by the manufacturer.

Step 2. Double-check that all controls (aileron, elevator,

rudder, and throttle) move in the correct direction.

Step 3. Be sure that your batteries are fully charged, per the

instructions included with your radio.

Preflight at the Field

A 7-channel or greater computer radio is highly recommended.

This allows the following features:

• Mixing the right aileron to the left aileron (flaperon mix)

• Electronically adjustable aileron differential

• Mixing the right elevator to the left elevator

(dual elevator mixing)

• Independent travel and trim adjustments of

each elevator half

• Mixing the right rudder servo to the left rudder servo

• Rudder to elevator mixing to correct rudder to

elevator coupling

• Rudder to aileron mixing to correct rudder to

aileron coupling

When using a 7-channel or greater computer radio, each servo is

plugged into its own separate channel. Consult your radio

manual for specific details on hookup and programming.

If using a 6-channel radio with flaperon mix, the aileron servos

are each plugged into their own channels. The right aileron plugs

into the aileron socket in the receiver, while the left aileron plugs

into channel 6. With flaperon activated in the programming, this

allows for independent travel adjustment of each aileron in each

direction and electronic aileron differential. Consult your manual

for more programming details.

With a 6-channel computer radio, it will be necessary to

Y-harness the 2 rudder and elevator servos; a reversed elevator

servo is needed to achieve the correct control direction. A servo

reverser can be used here. Special attention must be taken with

the rudder servos so that they don’t fight each other throughout

the rudder travel. This is caused by nonsymmetrical pushrod

geometry from right to left. It may be necessary to rotate the arm

on the servo one or two splines (most of the time toward the

rear) and readjust the linkage length in order to prevent binding.

Using a non-computer radio will require that the aileron,

elevator, and rudder be Y-harnessed. Be sure to use a reversed

servo (or a reverser) for one of the elevator servos. Special

attention must be taken with the rudder servos so that they don’t

fight each other throughout the rudder travel. This is caused by

non-symmetrical pushrod geometry from right to left. It may be

necessary to rotate the arm on the servo one or two splines

(most of the time toward the rear) and readjust the linkage length

in order to prevent binding. If you’ve ever thought about

purchasing a computer radio, now is a good time to do it!

Section 14: Radio Setup

Recommended Control Throws

Standard 3D

Aileron 1

/2" up 1

/8" down (18° up 17° down) 2

/2" up 2

/4" down (37° up 35° down)

Elevator 1

/8" up 1

/2" down (16° up 15° down) 4" up 4

/4" down (42° up 44° down)

Rudder 4

/2" right and left (26°) 8" right and left (44°)

Section 15: Control Throws

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Zenoah TWIN GT80 Instruction Manual Page 32

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