RCU Forums - View Single Post - Want to move elevator servo to tail - tips?
Old 12-19-2009 | 12:10 AM
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Jetdesign
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Default RE: Want to move elevator servo to tail - tips?


ORIGINAL: JohnBuckner


ORIGINAL: gaRCfield

I'm assuming since the manual suggests only a single, 45oz-in servo for both elevator halves, two servos with 30oz-in each should be enough...?

Yes your absolutely correct and doing so is fine. I am not familiar with the 82 but have used many 80, 81 and 85's and those are two screw mounts. I don,t know if the 82 is two screw or not but if it is then that is the root of my concern not the torque rating of the servo.

The problem arises when useing the torque values near their upper limits when used with a single sided output such as an elevator pushrod and worse if a fairly long output arm is used a rocking motion will be set up with the two screw mounts. The result will be mount screws constantly backing out. A few years back I tried using 85's in Q-500 pylon ships but the result was a lot of difficulty keeping servos in the airplane and a lot of missing screws.

John
It's pretty much the same thing as the 81; it's a 2-screw mount. I'll keep looking...