Jerry Hey wrote:
Hi Paul, sorry to send you J-pegs about something very much
unfinished
and in this case just cobbled together out of what was lying around,
hardware store bolts, etc. The photo I sent yesterday was hard to
decipher, again I apologize. I often build several examples of
something before getting it right. Each example is usually a lot
simpler than the one before.
Anyway, here is the strut taken apart. Nothing revolutionary,
just a
washer welded onto the tube and a bolt welded into it. The other end
of the strut (1/2" x .058) will be taped (3/8" NF) and a bolt (grade 8
all thread) with a pin eye for attaching to the fire wall. The
all-thread bolt will provide pitch adjustment for the engine. For
those who don't want to machine the pin eye an AN 165 x .375
Turnbuckle
End can be substituted for the all thread bolt at very little cost.
The advantage of the all thread is that it should provide a greater
adjustment range.
Cost of the entire rear engine mount for do-it-your-selfers would be in
the $20.00 range plus whatever the Barry Mounts cost.
In the photo, the small section of tube is 9/16 o.d. that I bored out
to
receive the shaft of the 3/8" bolt which is rosette welded in place
and
the washer welded to it. The 1/2" tube was tacked on just to see how
it
would look. The next one will be be one tube, 1/2" x .058 full
length. Jerry
The bracket (bent down angle iron in the prototype) will be easy to
fabricate out of 4130 flat plate. Two questions, what thickness of
4130 do you recommend for the load and what is the ideal angle for the
strut? Thanks, Jerry
The second one won't display because it has no dot extension.
Is it a jpg ?
Paul Lamar
I just sent the thing to myself and it opened. It is a Jpeg. try
again:
You need local bending stiffness.
Ideally it should be welded out of 1/4 thick aluminum angle but if
you don't want to do that .058 4130 should be stiff enough.
The ideal angle is stright up and down but what it will come out
at depends on how far forward the engine is from the firewall.
Paul Lamar
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