Cessna 120-140 Association

Does anyone happen to have any idea what the lengths, thicknesses and spring rates of the rudder return springs are? I've recently found that my plane appears to not have the Cessna specified springs. The cable tension seems excessively low (to the point rubbing on a fuselage former) and the spring rates of the springs that are in the aircraft are not equal at rest causing the resting position of the rudder to be non-centered (without the tailwheel steering springs attached).

How about this? Had to make it a Word File. Let me know if you have trouble downloading it and I will send you a copy off line.
Larry Lowenkron
C140A
N5641C

Interesting and informative document. The left and right springs are different lengths on my 140’s.

Yes, the overall length is different, the free length is the same.

Larry Lowenkron

I couldn't have asked for anything better. Thanks!

If I remember correctly, they are not all that easy to replace and quite expensive to buy.

Springs are different for left and right. PN 0411837-1 and 0411837-2. Cost about $60 each.

One rudder pedal shaft is forward of the other, so the springs have to be different lengths. The spring portion is the same on both so the tension is the same.

Hi,

I am unable to read the diameter of the spring on the document. could someone tell me what the diameter is?

Thanks
Kurt

See note 3 - ".051 music wire"
Larry Lowenkron