I was lucky enough to acquire this drawing at S&F.

The lag screw on the left of the vertical center line is one of several that retain
the wood
blades.

There are a couple of other interesting features. The blade yoke balls are fed in
from the front
and then a structural cover is bolted on. To facilitate this the pitch change
yoke is two piece. Somewhat more complicated but better cosmetics.

Paul Lamar
 
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