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Old 07-21-08, 02:12 PM   #8 (permalink)
svsgt1
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Join Date: Feb 2008
Location: FL USA
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Re: Shift Return Spring Example Needed

Quote:
Originally Posted by Jim C View Post
Where the shift shaft goes into the box and connects to the selector forks I am certain there are 2 coil springs in there that cancel each other out at rest.
You maybe able to increase the tension.

I have an O1E on a rod set up and it centers strongly, maybe your cables are dragging.

Jim

Jim,

Actually the way the 01E returns is very smart and simple. It does NOt use 2 coil springs. It actually uses only 1 spring for the left/right motion. The shaft itself has a V shaped grove. There is one preloaded spring with a ball point tip on it. It acts perpendicular to the V. The center/rest position is the middle of the V. When you move the stick left the shaft and V moves left and the spring compresses. The spring force acting downward on the V forces the shaft to move back to the center position.

I was debating whether or not to make my own spring here with a higher spring rate, but decided it woudl be easier to make another system with 2 pull springs. The stock spring thingy is about $70-80 so they are not cheap. But they are pretty cool as they are threaded and just screw into the box. Very clean and simple and work great.

Adam
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