Vance Jaqua wrote:

--- Paul <rotaryeng@earthlink.net> wrote:

I cut the pitch change  yoke down so no hand
clearanceing will be necessary.

This is about the simplest and easiest to make
constant speed prop
hub I have come up with so far. Thanks Vance for
that suggestion.

I will work on the part drawings soon. I also need
to do a few stress
checks.

Paul Lamar

Should work - tho I liked the loading hole offset from
the race, and the shank to take some of the torque,
and seal the guts - Vance

I could not figure a way to put it together. The yoke has to go
in before the shanks so there was no way to offset the holes.
I hope the screw is hard enough to match the hardness of the race.
I will recommend hardening the screw separately after it is machined
with the outer housing. Each screw will then be matched to its
original position by a trial assembly.

Also in your design you had a collar around the shank outboard of
the bearings. I felt this might bind if the blade was subjected to
any bending loads. I think it needs a little clearance in that area so it can 
take up a position solely controlled by the combination of
the really high axial tension loads (due to centrifugal force) and whatever
bending loads are present. I think the guts can be sealed well enough
with some RTV. Once the prop starts spinning any water in there is coming
out.

Paul Lamar
 
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