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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › Servo voltage, Talon 90, 3GX
11-10-2013 03:21 PM  4 years agoPost 1
dahodevil

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des allemands,LA USA

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I have a JR 8900g on the tail of my 550e. The servo specs say 4.8v only. The Talon 90 ESC is set at 6.0v and I can't change it with the radio sticks. Does this servo really have to run on 4.8v?
I have the castlelink but when I connected it to the USB the light came on for about 1 minute and then went out. I tried different cables but it won't connect.
What volts do you guys run the receiver at?

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11-10-2013 03:37 PM  4 years agoPost 2
sansone

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North Florida USA

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I have run 6v through 4.8v servos without issue, many flights actually. the servos were Futaba analog servos, forget the number right now

Fusion 50 FBL / Futaba 8FG / Beastx

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11-10-2013 07:39 PM  4 years agoPost 3
dahodevil

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des allemands,LA USA

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Thanks Sansone,
Anyone else running 6v on a 4.8v servo.
Any thoughts on the Castlelink not responding.

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11-10-2013 07:48 PM  4 years agoPost 4
Funky Trex

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Westerville, OH - USA

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I would not run 6 volts with the 8900. The servo works well with a step down to reduce voltage to under 5.4 volts. Some 4.8 tail servos work fine on 6 volts (bls251) but I would not reccomend it for the 8900, it doesn't need it and can cause it to wear out faster and be more sensitive to set up properly. I have run the 8900 in 50s and 90s with a step down and never felt they were lacking in power or tail holding authority.

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11-10-2013 08:02 PM  4 years agoPost 5
dahodevil

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des allemands,LA USA

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So, don't set the ESC volts to 4.8, just step the volts down to the 8900?
Which device would you recommend, and does it install inline between the gyro and the servo?

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11-10-2013 08:08 PM  4 years agoPost 6
Funky Trex

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Westerville, OH - USA

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Set the voltage on the Talon to 6 volts. The step down goes between the gyro and tail servo. I have used the align step downs, Western Robotics step down and MPI single servo regulator (for High voltage setups).

Currently all of my large helis have high voltage tail servos except my Logo 500. I am running the Align step down on it because it was the first one I found in my hobby room. It has been a while since I ran step downs on my older tail servos since going high voltage on my other large helis so you should do some research to find the best step down options currently available.

This is a link for the Western Robotics step down I used

http://www.amainhobbies.com/product...w-LED-Indicator

This is a link for the step down I currently use on my Logo

http://www.amainhobbies.com/product...ltage-Regulator

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11-10-2013 08:37 PM  4 years agoPost 7
dahodevil

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des allemands,LA USA

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Hey Funky Trex,
I ordered the western robotics. Thank you for the help.

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