servo

[dktflyer]

I have a question about the DS821 servos and I was wondering what size(max) heli I could use them in without them being in danger of stripping. Any help would be great. Thanks

[Charlie06]

Personally I wouldn't put them in anything bigger then a 50 size heli.


Torque:72 oz/in @ 4.8v, 88 oz/in @6v
Speed:.19 sec/60° @ 4.8v, .15 sec/60° @ 6v

[dktflyer]

thank you that will help alot.

[barracudahockey]

30 size, DO NOT use them in a 50
Here's what JR says

New Guidelines for DS821 Servo Use
Tuesday, February 20, 2007

The DS821 servo is a powerful, accurate sport digital servo recommended for RC airplane applications up to 1.20-size. For helicopters, the DS821 operates best with 30-size glow models, and up to 50-size electric. Loads and vibration in larger models may cause premature failure of the servo resulting in damage or injury to property and persons.

Important: Do not use liquid thread lock with the DS821 servo!

Do not use any form of liquid thread lock to secure the servo arm screw to the output shaft of the DS821 servo. Chemicals in these liquids react with the polycarbonate gear set causing the plastic to become brittle, fracturing the final output gear.