Operation Manual

TIP: setting static tail rotor compensation

If the building instructions supplied with your helicopter do not

state recommended values for tail rotor compensation, a good

starting point for the mixer is as follows:

• Swivel both tail rotor blades so that they face vertically up-

wards, as described for the basic tail rotor setting (see 8.6.2).

• Move the collective pitch stick to max. collective pitch (climb).

• Set up the tail rotor compensation mixer TROT CP so that the

distance between the two blade tips is to around 30 mm.

The optimum setting can only be established by practical flight

testing (see 8.6.7).

8.6.4. Auto-rotation

The term auto-rotation refers to a non-powered landing by a helicopter, i.e. it is a

method of landing the model safely if the motor should cut in the air. The collective

pitch of the main rotor is set to a negative value, and the airflow through the rotor

keeps it spinning while the model descends rapidly. Sufficient energy is maintained

in the rotor for a safe flare just above the ground followed by a gentle landing -

provided that the pilot judges the approach correctly. This flight manoeuvre is diffi-

cult to get right, but very important, and the COCKPIT

makes it as simple as possi-

ble to practise it. The transmitter can be fitted with an auto-rotation switch which

can be employed for practising auto-rotation landings as well as for genuine

„autos“ if the motor actually cuts in flight. Install a 2-position switch in the left-hand

outboard well, and connect it to socket S3. You can then use it to switch directly

from normal flight to auto-rotation.

What does the auto-rotation switch do?

The switch disables the collective pitch / throttle mixer, which is automatically acti-

vated when you select the Helicopter model type. For auto-rotation practice the

auto-rotation throttle setting (AROT GAS) can be set to any value in the range 0 to

75%.

This is how you set auto-rotation throttle:

Procedure

Display

GB: D:

Select the AROT THrottle setting in the MIX menu

and switch to the second line

AROT AROT

TH GAS

Set the auto-rotation throttle value e.g. 45%

Return to the first line

Continue as shown in the flow chart

! See also the notes on the following page!