Paul,


I have narrowed my motor mount down to a few choices and I was wondering if
you have anymore pictures of this mount or know the width and height
dimensions on  the firewall attach points?  Also I don't understand where
the engine mount attaches on the exhaust side of the engine. I am assuming
it would be the same as the exhaust side engine mount on my engine
necessitating a curvilinear oil pan.  BTW you sent this pict out on a post
Nov. 8th 2005. titled "Renesis Oil Pan"


Thanks


Doug Fir

Well here is what I have. Perry Mick built the mount shown but he did not
use it. Perry made a mock up, this mount and a lot of 2D dwgs. Despite all
this
he flies with the engine solidly bolted into his Long EZ to this day.

This mount idea was originally intended by me, for a Cozy and thick composite
plywood cored firewalls.

John Slade flies with it to this day. He reports very little
vibration. John got mad at me after I forced him to fix the initial
go around when his welder left out some critical tubes. He has been
bad mouthing me ever since on anything else he can think of :)

I call it the bushing in firewall trick. Dates back to March 2003 or before.
Pre Rhino.

-- 
Paul Lamar ...No rotor no motor.

Paul,

Thanks a lot. This helps.  In all of my options I have finally decided that
it would be best to modify my present engine mount by cutting out the
diagonals, and the top and bottom horizontal cross braces and while securing
the rear part of the engine mount have the front jacked outwards about 3"
per side. New diagonals and cross pieces could then be weld in and the whole
unit set out for heat treatment to relieve the stress.  The present
dimensions of the engine attach points were designed with a rear mounted
Lyc. IO-540 in mind thus the pitch is presently only 15 3/4" wide by 17 3/4"
high on center. Height is OK for me, just, but width is to narrow to make
any kind of sturdy bed mount.

Perry's design works for my 2nd gen test engine but not large oil pan I am
thinking about.  I  am therefore leaning towards sandwiching a 1/4" thick
4130 steel plate between the engine and bell housing to catch the front
Barry mounts. On the pulley side mount I can use something coming off my
early front cover. A few ideas you have sent me before are food for thought
though not exactly what I have in mind. Yours or anyone's thoughts would be
appreciated.

Thanks

Doug Fir

Hard for me to comment without seeing a 3D. Rhino has me spoiled.
Do a hand 3 view sketch and scan it in. Or take a few side views and front
views straight on of your stock motor mount. Also a top or bottom view.

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BTW Doug the last thing you should design is the motor mount.
You need to make sure it clears everything. Either do a Rhino
3D or a Styrofoam mock of of everything. In particular the exhaust
as that is where people run afoul of the motor mount most often.