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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsAlign 3G › servo question
02-02-2010 02:24 AM  8 years agoPost 1

rrKey Veteran

Peoria, Az.

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I just got mine today and was skimming the manual. The first thing that hit me was on Pg 7 "usage and setup instructions" where item #2 says the recommended servo spec is minimum speed .10 sec and 166 oz-in torque.

I was planning on using Futaba S9255 servos since they are already in one of my 600N airframes. These are .16 sec and 125 oz-in.

How critical is it that the servos meet the specs in the manual?

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02-02-2010 02:28 AM  8 years agoPost 2

rrElite Veteran


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I would think it's fairly critical to have fast servos on cyclic. After all, it is being gyro controlled.

Think about what happens when you put a slow servo on the tail.

Hell... I can fix that.
Uh oh..
It's ***ked!!!

02-02-2010 03:19 AM  8 years agoPost 3

rrKey Veteran

Tucson, AZ

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Speed is very critical when you are talking gyro's. Think about when the gyro makes a correction. If the servo is slow then the corrections will be behind the heli and take effect too late. Now the gyro has to correct for the late servo movement and so it will end up fighting itself in a way.

If the wings are traveling faster than the fuselage, it's probably a helicopter

02-02-2010 03:58 AM  8 years agoPost 4

rrElite Veteran

Irvine, California

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Regardless of what the manual recommends and what everybody says, I have been flying my T-Rex 600 with 3G on 9252 for over 3 weeks now. Works perfectly fine, and the improvement over flybar is very noticeable even with these slow servos.

02-02-2010 04:03 AM  8 years agoPost 5
Skookum Robotics


Vancouver, BC - Canada

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Low latency actually matters more than servo speed, though no servo manufacturer I know of lists that. The delay between a change in the gyro's output and the servo starting to change its position can be several frames.

02-03-2010 01:29 AM  8 years agoPost 6


Lehigh Valley, PA

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Can you recommend servos with "low latency"?

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