Paul,

   Perhaps Lynn can answer this one easily.  I am wondering if the
   transmission spline size and shaft was enlarged when Mazda went from a
   13B to  the 20B.   Do racers use over sized shafts and splines to handle
   the larger amounts of torque and power.

   Doug in Japan

   Those pro road racers using 3 rotors are using $50,000 Emco
   transmissions. http://www.emco-gears.com/GT46.html
   That is the least of their worries :)

   Most of the airplane people are using the same input shaft Tracy is
   using on the
   two rotor. I think it is from a Ford V8 or some such. It mates up
   with a clutch
   disk center. I don't know what Mazda did on the 3 rotor Cosmo. Your
   buddy should be able to answer that question.

   Paul Lamar


I used the Tilton sport discs for a Volvo in my Mazda input shaft Saenz
transmission. And Chevy 15/16 fine spline on the richmond gear
transmission. The rotary, even the three rotor, have dismal torque and
there is little problem with shaft size. Drag racing with a heavy
flywheel would need a deeper evaluation. Nice pictures.

Lynn E. Hanover


Thanks Lynn.

BTW Tilton is my old Lamar Engineering company with a name change.
I sold it too cheap around the early 70's and retired for awhile
on my sail boat :)

Paul Lamar

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