Subject: Seawind motor mount.
From: Rotary Engine
Date: 6/11/2007, 10:47 PM
To: AARotary Engine



    > 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.

   --------------------------------------------------------------

   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.

   --
   Paul Lamar ...No rotor no motor.



Doug,
If you want a Sea wind motor mount to cut up or try your experiments on, I
have one you can have that I was about to junk.
John Prendergast



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