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All sizes of nitro powered helicopters

500-class and larger electric helicopters

Co mpatible with all Spektrum™ and JR® DSM2™ full range

transmitters  including: 

Spektrum DX6i (RevLimit function not available as only 

six channels are present) 

Spektrum DX7 

JR X9303 2.4 

JR12X

Note:  Not compatible with Spektrum’s DX6 parkflyer system (DSM)

Spektrum’s AR7100 series receivers offer the ultimate system for 

high-performance nitro or 500-class and larger electric helicopters. 

Combining the bullet proof radio link of Spektrum’s DSM2 

technology with a built-in regulator for the Rudder, Aux2, Gear and 

Throttle channels and an integrated RevLimit limiter (AR7100R only), 

the AR7100 series receivers make installation of these normally 

complex devices clean and simple. 

The AR7100 features a “Fail-On” soft switch to ensure reliability and 

heavy 16AWG low resistance input power leads for uninterrupted 

power even under the most demanding high-current draw 

applications. The newly developed backplate rpm sensor makes 

this integrated receiver, limiter and regulator system the easiest and 

neatest possible to install with only one external rpm sensor lead for 

the limiter. Designed and developed by helicopter experts, the all-in-

one integrated design of the AR7100 takes the hassle out of installing 

and properly setting up separate receivers, regulators and limiters.  

Applications

Introduction

Features

Spektrum’s AR7100 and AR7100R receivers feature 5.2-volt regulated 

output power to the Rudder, Aux 2, Gear and Throttle channels 

allowing high voltage to be used to power cyclic servos for increased 

performance while the gyro and throttle servos are regulated to 5.2 

volts, necessary to be compatible with most manufacturer’s gyros and 

tail rotor servos. The “R” version (AR7100R) features an integrated 

RevLimit™ limiter that includes an easy-to-install backplate rpm 

sensor eliminating the hassles of installing magnets in the fan 

and mounting hall-effect rpm sensors on the engine or frame. And 

because it’s integrated with a single rpm sensor lead that plugs into 

the receiver, the AR7100R greatly simplifies limiter hookup and 

installation.   

•  Regulated 5.2-voltage output to the Rudder, Gear, Aux 2 and 

Throttle channels allowing the cyclic servos to be powered at 

high voltage for increased performance while the gyro and throttle 

servos are powered by the necessary compatible lower voltage 

(5.2V).

•  AR7100R incorporates an integrated RevLimit limiter with 

backplate rpm sensor offering the cleanest, easiest installation 

available. 

• Easy-to-mount backplate limiter rpm sensor eliminates the hassle 

of mounting magnets, brackets and rpm sensors. 

• Heavy-duty 16AWG input leads pre-wired with EC3 connector.

•  Dual outputs on the Throttle and Aux 2 channels (regulated to 5.2 

volts/ unregulated).

• One internal receiver and up to two remote receivers.       

• Soft switch fails-on if the switch is damaged.

•  Optional charge ON/OFF adaptor lead (included) allows charging, 

battery monitoring and ON/OFF through one easily accessible lead. 

•  Two types of failsafe—SmartSafe (throttle only) and conventional 

failsafe (all servos).

•  Quick Connect - If a power interruption (brown out) occurs the 

system reconnects in less than .25 seconds.

• Flight Log compatible.

• Compatible with all Spektrum and JR DSM2 full range 

 

radio systems. 

Note: The AR7100/AR7100R uses a specifically designed switch. 

Conventionally wired switches are not compatible with the AR7100.

Spektrum AR7100

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Spektrum AR7100

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Summary of Contents for AR7100 Series

Page 1: ...e 12848 2008 DSM and DSM2 are trademarks or registered trademarks of Horizon Hobby Inc Spektrum is used with permission of Bachmann Industries Inc Spektrum radios and accessories are exclusively available from Horizon Hobby Inc ...

Page 2: ...nd throttle servos are regulated to 5 2 volts necessary to be compatible with most manufacturer s gyros and tail rotor servos The R version AR7100R features an integrated RevLimit limiter that includes an easy to install backplate rpm sensor eliminating the hassles of installing magnets in the fan and mounting hall effect rpm sensors on the engine or frame And because it s integrated with a single...

Page 3: ...k 1350mAh SPMB1350LP LiPo Receiver Pack 2000mAh SPMB2000LP LiPo Receiver Pack 4000mAh SPMB4000LP LiPo Receiver Pack 6000mAh SPMB6000LP 1650mAh 6 0V NiMH Receiver Pack SPMB1650NM 2150mAh 6 0V NiMH Receiver Pack SPMB2150NM 2700mAh 6 0V NiMH Receiver Pack SPMB2700NM 4500mAh 6 0V NiMH Receiver Pack SPMB4500NM Flight Log Data Recorder SPM9540 Additional Remote Receiver SPM9545 6 Remote Receiver Extensi...

Page 4: ...iamps used per 8 minute flight 173mAh In the above example the average current was 1 15 amps which calculates to 153mAh per 8 minutes typical flight length It s recommended that only 60 of the available capacity be used to ensure plenty of reserve battery capacity In this example using 2000mAh batteries 2000 x 60 1200mAh available usable capacity divided by the capacity used per 8 minute flight 15...

Page 5: ... into the receiver ports NOTE It s necessary that one receiver be plugged into port B or R in order to operate The receiver should be mounted at least 2 away from the main receiver with the antennas perpendicular If using the RevLimit Limiter AR7100R only mount the rpm sensor and bracket to the backplate under two backplate screws of your engine as shown Note Threadlock must be used on the screws ...

Page 6: ...a flight log or voltmeter If the voltmeter is plugged directly into the male male extension the system is active and voltage under load system operational is displayed If plugged into the charging lead the at rest battery voltage is displayed Install the adaptor lead as shown to the right 2 T urn on the soft switch Note that the LEDs on all receivers should be flashing indicating that the receiver...

Page 7: ... system should connect in less than 15 seconds The receiver is now programmed for preset failsafe Note Fail safe positions are stored via the stick and switch positions on the transmitter during binding Before each flying session and especially with a new model it s important to perform a range check All Spektrum aircraft transmitters incorporate a range testing system which reduces the output pow...

Page 8: ...the AR7100 AR7100R The screen will automatically display voltage i e 6v2 6 2 volts Note When the voltage reaches 4 8 volts or less the screen will flash indicating low voltage Press the button to display the following information A Antenna fades on the internal antenna B Antenna fades on the left external antenna L Not used R Antenna fades on the right external if used F Frame loss H Holds Antenna...

Page 9: ...ensor mount has two positions extended for 90 size engines and retracted for 50 size engines When installed the rpm sensor should just contact the backplate No additional magnets or brackets are needed The rpm sensor picks up the magnetic effect of the crankpin as it passes the rpm sensor Install the servos in their appropriately labeled ports Note The throttle and gear channels have two outputs O...

Page 10: ...de on the X9303 2 4GHz or Aux 2 on the DX7 The servo monitor is helpful here 3 Set the throttle trim to the low off position 4 With the throttle stick at low throttle turn on the transmitter then turn on the receiver within three seconds toggle the switch that will control the limiter The ACT LED on the receiver will flash green indicating that the calibration mode is successfully entered 5 Raise ...

Page 11: ...on 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 ori...

Page 12: ... for any non warranty expenses and a brief summary of the problem Your original sales receipt must also be included for warranty consideration Be sure your name address and RMA number are clearly written on the outside of the shipping carton Warranty Inspection and Repairs To receive warranty service you must include your original sales receipt verifying the proof of purchase date Provided warrant...

Page 13: ... handing it over to a designated collection point for the recycling of waste electrical and electronic equipment The separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment For more information about where you can drop off your waste equipment ...

Page 14: ...Spektrum AR7100 25 Spektrum AR7100 26 ...

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