Spektrum AR7100 Series User Manual page 21

Calibration (continued)
Setting a Target RPM
The Gear channel's output sets the target rpm. See the diagram below.
Note that the limiter is turned off from 0% to 5% and the target rpm is
increased as the travel adjust/limiter setting is increased. Also note that
the rpm increases above and below 5%. Using the servo monitor is a
helpful way of verifying adjustment.
Adjust the gear channel's travel adjust (DX7) or the limiter program to
select the desired target rpm's.
Fig: Auxiliary Channel ATV to Target Speed.
Example: Engine RPM / Travel Adjust
Spektrum AR7100
Adjusting Throttle Curves
During the initial flights, a slightly elevated throttle curve that will give a
headspeed of approximately 50 rpm above the target rpm is recommended.
After operation is verified, some pilots use a 100% throttle curve in stunt
mode and allow the RevLimit to fully regulate the engine rpm. Remember
that flipping into normal mode and low throttle will deactivate the limiter
should an issue occur.
How the Limiter Works
The RevLimit waits for the engine to reach the target rpm set by the Gear
channel output. When the target rpm is exceeded, the limiter will smoothly
take over the throttle channel regulating the engine directly. If the rpm
drops below the target speed then normal control will be transferred to the
throttle channel.
The RevLimit will only limit the throttle if all of the following conditions
have been met:
1. The rpm sensor, throttle and gear channel are adjusted and
operating correctly
2. The RevLimit has been calibrated
3. The throttle is above 25%
4. The gear channel output is greater than 5%
5. The target rpm has been reached
EN
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