Jerry-


             The only thing keeping my engine where it belongs is a
         2x4.  This

             worries me, since I share the hangar & my airplane gets
         moved around

             when I'm not there.  So, to answer your question, getting
         the rear mount

             was my #1 project.  I do have the local guy who could fab it
         for me --

             he's ready to whip it out for me quickly once given the right

             measurements but he doesn't weld, so I'll have to find a
         welder too.


         Mark here is a photo of the prototype strut bracket.  Two things to
         note:  one, the inside measurement is 1" which is also the outside
         measurement of the rod end.  You may have to file the inside
         faces of
         the bracket to get a smooth fit.  Secondly, the bracket is off set
         toward the pilots side about an inch to clear the pan bolts so
         that  you
         can get a wrench on them.  check to make sure it will still line
         up with
         the firewall bracket.  If it will do the job, I will complete the
         welding and send it to you.  You will have to enlarge the bolt holes
         (Rod End) in the bracket.  Also, the bolt holes that attach to
         the pan
         will have to be enlarged (presently drilled for 1/4 inch.)   I
         am not
         set  up  yet to make the final version but it will be similar to
         what
         you see here. Lastly, there is a lip on the pan that will have
         to ground
         away in the area of the bracket.  I do have an extra Barry
         washer.   Jerry

         P.S.  It is heavily constructed.  If you want to drill a few
         lightening
         holes, go for it.


     Jerry -

     Thanks - I'll drive out to the hangar tonight after work & check
     clearances & whatnot and get back to you.

     Mark


Well, the hard point itself doesn't allow for any offsetting at all.
The bolt hole is dead-center & there is no structure anywhere else
(e.g., toward port) to tie into.  The rod ends don't look like they
would support any kind of angle to the strut.  Further, the prototype is
set up for bearing from underneath.. Based on the photo, it looks like
the mounting brackets don t extend out enough to allow a strut to come
down from the top.

So - it looks like this bracket won't do the job for my installation.
Thanks, tho.

Mark

What is the matter with coming up from the bottom Mark
as in this 3D?

Coming down from the top is not out of the question.
That big 1/2 inch shank on the rod end can take some bending loads.
There are ways around it. Do me a favor and use a fish
scale hooked to the back of the engine to measure the force
required to level the engine when you have a prop on there.
Or if you don't have a prop yet you can hang the weight of
a prop off the prop flange. This  will tell me precisely
where the CG of your engine is so I can  calculate the exact
loads on the rear motor mount.

Also are you thinking of replacing the oil pan? If so
a bracket suitable for coming down from the top can
be incorporated in the back panel of the oil pan.

Paul Lamar

Here is a dwg and pix on a oil pan with a built in rear motor
mount bracket.

Paul Lamar

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