Setting Throttle For Auto-Rotation Menu; Th Ar; Setting Up The Tail Rotor Menu: Tail - Multiplex COCKPIX SX Manuel D'utilisation

Moving to the TH MIN menu:
to MENU, , to CONTRL, ,
to TH , , to TH MIN,
The current percentage figure flashes. You can now set
any value within the range 0% to 100% in 1% incre-
ments using the 3-D digi-adjustor.
A brief press on the 3-D digi-adjustor concludes the
process. The value is stored.
TIP: for electric helicopters
With an electric-powered helicopter we recommend
that you set THRMIN to 0% and the trim to the mini-
mum value. The trim symbol on the screen should look
like this:
THR R = 0
(minimum back)
This ensures that a normalised UNI signal (1 ms to 2
ms) is passed to the speed controller.
16.6.6. Setting throttle for auto-rotation
) TH
CONTRL
Menu: (
Note:
Can only be set if flight phases are active!
The throttle setting for auto-rotation can only be set if
you have activated flight phases (
the A-ROT switch to ON.
When practising auto-rotation landings with a glow-
powered helicopter the motor should be left running so
that you can open the throttle again in an emergency.
There is a separate throttle setting for this, which is
activated when the A-ROT switch is operated. TH
AR (throttle for auto-rotation) is set in the CONTRL
TH menu.
Moving to the Menu TH
to MENU, (SETUP appears),
to CONTRL, (DR Q appears),
to TH , (GASQS3 appears, e.g.)
Move the A-ROT switch to the ON position (back)!
Auto-rotation is now switched on. The following display
appears, regardless of which point on the throttle curve
you have selected.
GAS AR appears, (the current value flashes)
Use the 3-D digi-adjustor to set a value within the
range 0% to 100% in 1% increments.
THR R = 1
(minimum forward)
AR
16.10.2.) and set
AR:
Operating Instructions
A brief press on the 3-D digi-adjustor concludes the
process. The flashing ceases, and the value is stored.
Note: throttle with electric helicopters
Set the auto-rotation throttle value to 0% and move the
collective pitch stick trim fully to the idle end-point. If
the speed controller has a soft-start feature, it may be
useful to leave the throttle slightly "open", so that the
motor gets up to speed more quickly.
16.7. Setting up the tail rotor
Menu: TAIL
TIP: for carrying out the basic adjustments it is best
to connect the tail rotor servo directly to the receiver
output for yaw (four-point rotor head: output 7; all oth-
ers: output 3). This ensures that the gyro has no effect
on your settings.
The tail rotor settings are included in the MIXER main
menu. The TAIL mixer has the following mixer inputs:
a. YAW from the YAW stick
Effect of YAW on the tail rotor servo,
separately right / left (differential)
b. COLL mixing from the COLL. PITCH stick;
static tail rotor compensation (REVO-MIX)
c. P ZERO Onset point for mixers
(COLL. PITCH for 0° main rotor setting)
d. OFFSET basic tail rotor setting
Tail rotor mixer
Fig. 16.7.: Tail rotor mixer
16.7.1. Checking / correcting the direction of rota-
tion, centre and maximum travel of the tail
rotor
The usual rule also applies to the tail rotor:
First set up the mechanical system correctly, then
make fine adjustments using the electronic functions.
This is the procedure
a. Move the yaw stick and check that the tail rotor
responds in the correct direction. If not, reverse
the tail rotor servo (brief instructions, servo revers-
ing 16.4.1.)
b. Set the yaw trim to centre
c. Check that the output arm of the yaw servo is at
right-angles to the pushrod.
If this is not the case, remove the output arm and
re-fit it as close as possible to the right-angle posi-
tion. Minor adjustments can be made by fine-
tuning the servo centre electronically.
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