Subject: Racing Beat all aluminum engines
From: Rotary Engine
Date: 10/26/2006, 8:15 AM
To: AA-me



    >> Hi Paul,
    >>
    >> Just to clarify, our aluminum side housings come with a 1/8"
    >> aluminum web at the bottom of a .060" deep side intake port
   shape (which
    >> is generally necessary to avoid contact between the rotor and side
    >> housings). For peripheral ports, the web should be backed up with
    >> aluminum Devcon filler to support it. For side intake, the web
   can be
    >> removed.
    >>
    >> Jim Mederer

   Paul,
   Since Jim seems to be monitoring the newsletter I thought I might ask
   the important question. Jim, if I show up on your door with cash do you
   have aluminum side housings to sell? A second question, Jim I'm going to
   run a 20B in an RV-10 and want to know if you make, or have any plans to
   make, an aluminum intermediate housing? An all aluminum version of the
   20B was calculated (by Paul I believe) to save about 57 pounds! Lastly
   are your P-port housings based on the factory p-port casting or are they
   modified 13B housings? Many thanks for any information,
   Bill Jepson



Hi Bill,

   We currently have in stock various models of the narrow intermediate
and rear housings.  By the end of this week I hope to have the first
batch of machined front housings, but they will still require flame
spray coating to finish, which will take a little longer.  I have no
plans to make the wide intermediate housing for two reasons - low demand
and the problem of getting adequate strength and stiffness in the mount
for the stationary gear, which is already weak in cast iron.  A steel
insert could be cast into the center of the housing for support but this
is a major complication in itself.

   We looked closely at the factory aluminum housings and the 1993~95
production housings, but the design is our own.  We did use the shape of
the 93~95 [side] intake port (since it is the best ever) and added numerous
internal ribs and fillets for strength.

Jim Mederer

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