Tuesday, May 17, 2005

Tom Copp on the length of servo horns

Tom Copp posted this on the F3F Yahoo group.
I have his permission to reproduce it here...

Are your servo control horns too long?

Your servo control horns are too long if:

You re got the rates cranked down for that servo.

Your end points or travel volumes are well below 100%

You have lots of Expo on that servo.

You are always breaking gears.

If you re only moving the servo 10 or 15 degrees for full throw you are not using all available travel and your resolution for that control surface is null. It would be better replaced with a button.

Sometime a unique install is needed because of bad servo placement or ?? and a long arm is needed to short cut the fix or its simply was no other solution.

On a normal installation using 75 degrees or more servo movement for full deflection will get you a very smooth and controlled input and result in better feel You can make small changes in flight input and get small changes out of your model. Yes it will slow down your rate of deflection but if you re the guy with long arms and 5 cell packs that keeps us ducking for cover on race day learn the ZEN secret of slowing down to go fast

Tom Copp

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