User manual

Example throttle curves for different Quick Links:
+100% +100% +100%
0%
0%
0%
Output
Output
Output
2 3 4 51
2 3 4 51
2 3 4 51
Control travel Control travel Control travel
Hover
Aerobatics 3D
References to using the throttle limit function:
•
In any case, you should use the throttle
limit function ("Channel set", page 94).
The throttle servo is normally completely
separate from the throttle curve at the left stop of the
(throttle limit) proportional dial DV1, the motor is
idling and only reacts to CH1 trim. This option allows
you to start the motor from any Quick Link and switch
it off using digital trim.
After starting the motor, s l o w l y turn the throttle
limiter to the opposite stop in order to completely
actuate the throttle servo using the throttle/pitch
control stick. To keep the throttle servo from being
limited by the throttle limiter in the full throttle
direction, in line "CH9“ (mz-18 HoTT) or "CH12"
(mz-24 HoTT) of the display "CH5-9" or "CH5-12" of
the submenu "D/R,EXP" of the base menu, set the
control travel on the plus side of the "Travel" column
to +125 %:
NORMAL
Starlet
+100%
+100%
RES
+100%
+100%
+100%
+100%
+100%
+100% +100%
+125%
BACK
CH
CH6
CH7
CH8
CH5-12
INC
DEC
CH5
CH9
D/R –
D/R –
D/R +
D/R +
S
NORMAL
Starlet
+100%
+100%
RES
+100%
+100%
+100%
+100%
+100%
+100%
+100%
+100%
+100%
+100%
+100%
+125%
+100%
+100%
BACK
CH
CH6
CH7
CH8
CH5-12
INC
DEC
CH5
CH10
CH11
CH12
CH9
D/R – D/R –D/R + D/R +
S
• Since electric drives do not require an idle
setting, when making the basic settings for an
electric helicopter, ensure that the control range of
the throttle limiter reliably exceeds or falls below the
setting range of the motor control unit which normally
extends from -100% to +100%. The "Travel" setting
of the throttle limiter may have to be correspondingly
adapted in all Quick Links in the line "CH9" or
"CH 12" of the display "CH5-9" or "CH5-12" of the
submenu "D/R,EXP".
The throttle curve should be adapted in the same
manner as with a gas helicopter in flight.
• In order to measure the flight time of a (gas)
helicopter, you can assign a control switch to the
throttle limit servo and use it to switch on and off a
timer, see page 80.
During autorotation flight, this mixer
automatically switches to a settable
default, see page190.
Helicopters with a governor
In contrast to speed controllers that only regulate
performance like a carburettor, governors maintain
a constant the speed in the system that they are
monitoring by independently regulating the provided
output. In the case of a gas helicopter, the control
independently controls the throttle servo like the motor
control unit of an electric helicopter. Governors therefore
only require a speed setting and not a classic throttle
curve. A deviation from the set speed occurs when the
required output exceeds the maximum available output.
Normally, receiver output 8 is used for connecting a
governor, see receiver assignment on page 41. If this
connection is used, the gas throttle limiter is not used
since it exclusively acts via the "Throttle curve" mixer on
output 6 which is not assigned.
In order to take advantage of the comfort and safety
features of the throttle limiter, connect the governor
to receiver output 6 in deviation from the general
connecting strategy, and only adapt the throttle curve so
that it can assume the task of the normal servo.
Since the throttle curve in this case only determines the
target speed of the motor control unit and this target
speed normally remains constant over the entire pitch
adjustment range, set a horizontal line in the "Throttle
curve" mixer (each (pitch) input value results in the
same (throttle) output value) whose level determines the
target speed.
First, delete support points 1 to 5 that may be set, and
then set the support points "L" (input = 0%) and "H"
(input = +100%) to the same value, for example:
NORMAL
Starlet
ENT
TRIM
+100%
+050%
+075%
H
BACK
S
IN
OUT
POINT
OFF
INC
DEC
Y-axis
X-axis
ST ON
Curve
THR.Limit +100%
The value to be set depends on the governor that is
used as well as the desired target speed, and can of
course be varied for specific Quick Links.
During autorotation flight, this
mixer automatically switches to a settable
default, see page190.
182
Helicopter model function menu - THR.CRV
S1006_mz-24.3.en.indd 182 17.12.2014 15:22:40