Operation Manual

• Set maximum and minimum collective pitch on the main rotor as described in

the helicopter instructions.

• It is important to set up the throttle servo linkage in such a way that the motor

can be set to full throttle with the idle-up slider, and can also be stopped

completely without the throttle servo being stalled (mechanical obstruction)

at either end-point. This is done by selecting the correct pushrod length and

using the correct linkage hole on the servo output arm.

TIP for setting up the main and tail rotors for hovering:

If the helicopter instructions do not state collective pitch values, a good starting

point for the main rotor is a collective pitch of around 5° for the

hover.

The tail rotor can also be set up approximately as follows (see

drawing alongside):

• Swivel both tail rotor blades so that they point vertically

upwards

• The distance between the two tail rotor blade tips should be

about 10 - 15 mm. Adjust the length of the tail rotor pushrod

until this is the case.

With the pitch angle set correctly, the tail rotor will counteract the

torque of the motor at the hover. You will need to carry out a se-

ries of practical flight tests to find the optimum setting. The aim is

to prevent the model’s tail swinging round when the model is in a stable hover.

8.6.3. Static tail rotor compensation

The basic setting of the tail rotor required to counteract the torque of the main

rotor at the hover has already been established in Chapter 8.6.2. If you cause the

helicopter to climb or descend from the hover (by changing the collective pitch

setting), main rotor torque also rises and falls. The helicopter then tends to rotate

around the vertical axis, since tail rotor compensation is no longer correct. When

adjusted correctly, static tail rotor compensation is designed to correct this un-

wanted rotation when the helicopter climbs or descends.

This is how you set static tail rotor compensation:

PROCEDURE

Display

GB: D:

Select the TAIL PI setting in the MIX menu and

switch to the second line

T-ROT HECK

Set the mixer value e.g. 20%

Return to the first

Continue as shown in the flow chart