Brass vs. Bronze Shims for Cyclic Control Bar/Pitch and Pivot Assembly

skyking

Skyking
Joined
Dec 9, 2003
Messages
100
Location
Red Lion, PA
Aircraft
SparrowHawk I
Total Flight Time
200
While inspecting my SparrowHawk I RotorHead I noticed some movement beneath my ring gear where the pitch piviot assembly attaches to the cyclic control bar. I need to add some shim washers on both sides of the cyclic control bar to eliminate play while keeping the control bar centered. What material washers should be used? Brass, bronze, other? There is a minimal amount of "play" but it is noticeable. Thank you.

Andrew
[email protected]
 
Ultra-high-molecular-weight polyethylene shims will probably work well.
 
Xenon / Zen 1 Trendak use the plastic poly washers and spacers in the head and other control surface assemblies

if you were going to make new bushes and eliminate the need for shims ( more precise machining needed) I would use Pb
 
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