> It will take years to get the duct
    > tested well so perhaps an all aluminum engine will be happening
   by then

   I am told the racing beat folks are now able to ship aluminum
   housings. Not
   cheap but available.
   http://www.racingbeat.com/FRmazda2.htm
   Anybody know if that is for real?

   jofarr, soddy tn



   I just checked out the Racingbeat website and they claim these housings
   are excellent, in terms of wear resistance. They claim to use a
   "flame-spray" (or plasma spray) that embeds a carbide material whose
   "durability greatly exceeds that of the nitride surface found on the
   stock housings."

   The add that they could find "no measurable wear" even on very
   high-output turbo engines, and that this flame spray is so good they now
   use it on the stock iron housings as well.

   One good feature is that the housings are cast for P-port applications,
   so you don't need to worry about filling existing ports with some kind
   of goop.

   These housings are 50 to 60 percent lighter. It should be a weight
   savings of about 40 pounds on a 2-rotor engine and more on a 3-rotor.

   If this product is good enough to work reliably in an aircraft engine,
   then the price is a good deal. For a 2-rotor, you would be looking at
   less than $5,000 for a complete aluminum engine; for a 3-rotor add
   another $1,700 for an additional intermediate housing.

   For a "personal jet" type of airplane this is a tiny fraction of total
   cost and well worth it -- provided it is a solid product.

   Regards,

   Gordon.

   RB not cast for P-port. Look carefully at the pictures.
   Here is one I took and some pictures of Everett Hatch's
   engine that was designed from the out set as a p-port.
   P-port end housings are much easier to cast.

   Paul Lamar


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


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