GRAUPNER mc-16 Programming Manual

125
Program description - Control adjust | Helicopter models
As already described on page 110, the digital trim of
the throttle / collective pitch stick is only active in the
“Auto-rotation” flight phase, assuming that you have
selected “AR” in the “Throttle” line of the following
menu …
»Stick mode« (page 110)
Thro
Roll
Nick
Tr
+
time
4
4
4
0.0s
0.0s
0.0s
4
0.0s
Tail
0.0s
0.0s
0.0s
0.0s
GL
GL
GL
St
AR
…. which is available on the mc-20 HoTT transmit-
ter only. This means that the idle of the motor or engine
cannot be controlled in the “normal” flight phases using
the C1 trim lever. To ensure that adequate adjustment
is still available, we recommend that you use “Expo
throttle limit”.
The exponential curve characteristic offered by the …
Throttle limit in combination with “AR” in the »Stick mode« menu
»Helicopter type« (page 102)
Expo thro lim. 0%
SEL
Linear. swashpl.
no
Rotor direct
right
Heli type
Pitch min. back
… menu’s sub-menu can be used to alter the control
behavior of the throttle limit control such that the latter
provides sufficiently sensitive regulation of the idle set-
ting and can also stop the motor.
In this case, with a completely closed throttle limiter – in
contrast to the previously described setting – use the
»Control adjust« menu set the “-” side of the column
labelled “- travel +” for the “Lim.” line such that the
throttle limiter fully closes the carburettor, i. e. the motor
is safely switched off at this control position.
Following this, move the throttle limit control to its
centre point and change the % value of the “Expo thro
lim.” line in the »Helicopter type« menu, page 104,
until the carburettor is in a position suitable for starting
the motor. Now start the motor, and adjust the value
if necessary until the motor idles reliably in this throttle
limit control position.
The value for the plus side of the “- travel +” column
should be increased, as described before, to +125 %
so that the full-throttle position of the throttle servo is
also reliably released from the throttle limiter.
Finally, set an asymmetrical time delay of, say 4.0sec-
onds, so the motor also picks up speed gradually
even if the side proportional slider is pushed forward
too quickly. Select the time preset to correlate to how
far the carburettor opens up at the minimum collec-
tive pitch position. The value set is to be optimized by
testing.

GRAUPNER mc-16 Specifications

General

Brand	GRAUPNER
Model	mc-16
Category	Remote Control
Language	English