Paul, I have not been their in a long time, so glad you enlightened me about the changes in the Sun'N'Fun. What a shame, is their any aspect of our nation uninfected by liberal decay? I so wanted to see the Allison PSRU with the promise of 4 Rotor builds.

   Speaking of the 4 Rotor, since as I read here that the 4 Rotor Engine is so rare, has anyone done a build using two 2 Rotor engines with appropriate mods to make a functional 4 Rotor from Mazda engines?

   George Curtis

   I have never heard of it. Plenty of people build four rotors.
   They use mostly stock 2 rotor parts and fashion a new four rotor e-shaft.
   It is not rocket science. There is a guy on the Drift circuit using
   a 4 rotor. As I recall there are a couple of Oz (Australian) outfits
   that sell four rotor e-shafts.

   IO have been thinking about one made from separate eccentric parts
   and a simple center shaft.  This would greatly cut the cost IF it worked.

   One of the best ideas I ever heard about making E-shafts is hydro
   forming. That is where a hollow steel tube is put in a mold and
   tremendous pressure is applied to form the lobes.  I suspect the
   the tube is heated to high temperature first. I think a lot of steel
   car and truck tubular frames are made that way. Stuff is made in
   minutes not counting the heating time.

   Paul Lamar

You can not heat it much as the oil/water would boil or carbonized. Metallurgy and post heat treat I think. Body panels are also made this way in steel or aluminium. For this a mold is installed a a sheet is slipped in. An outer piece comes down and clamps the sheet. Then high pressure liquid is pumped in which forms the sheet against the mold or form. The the liquid is pumped out.
Dale Davies



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