Spektrum AR7100
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Spektrum AR7100
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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.
During the initial flights, a slightly elevated throttle curve that will
give a head-speed 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
The RevLimit will pass control back to the throttle channel (controlled
by the throttle curves) if any of the following occurs:
1. The throttle stick (output) is below 25%
2. The Gear channel output is less than 5% (travel adjust or
limiter setting)
3. The rpm sensor fails
The Spektrum AR7100R RevLimit feature employs technology
exclusively licensed to Horizon Hobby, Inc. from Model Avionics.
Calibration (continued)
Adjusting Throttle Curves
How the Limiter Works (continued)
Warranty Period
Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products
purchased (the “Product”) will be free from defects in materials and workmanship for a
period of 1 year from the date of purchase by the Purchaser.
Limited Warranty
(a) This warranty is limited to the original Purchaser (“Purchaser”) and is not transferable.
REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE
EXCLUSIVE REMEDY OF THE PURCHASER. This warranty covers only those Products
purchased from an authorized Horizon dealer. Third party transactions are not covered
by this warranty. Proof of purchase is required for warranty claims. Further, Horizon
reserves the right to change or modify this warranty without notice and disclaims all
other warranties, express or implied.
(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR
IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE
OF THE PRODUCT. THE PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE
DETERMINED THAT THE PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF
THE PURCHASER’S INTENDED USE.
(c) Purchaser Remedy- Horizon’s sole obligation hereunder shall be that Horizon will, at its
option, (i) repair or (ii) replace, any Product determined by Horizon to be defective. In
the event of a defect, these are the Purchaser’s exclusive remedies. Horizon reserves
the right to inspect any and all equipment involved in a warranty claim. Repair or
replacement decisions are at the sole discretion of Horizon. This warranty does not
cover cosmetic damage or damage due to acts of God, accident, misuse, abuse,
negligence, commercial use, or modification of or to any part of the Product. This
warranty does not cover damage due to improper installation, operation, maintenance,
or attempted repair by anyone other than Horizon. Return of any goods by Purchaser
must be approved in writing by Horizon before shipment.
Warranty
Fig: Auxiliary Channel ATV to Target Speed.
Example: Engine RPM / Travel Adjust
