Got the engine complete, and it is coming out at 148lb. It includes
  starter, alternator, redrive, carburetor, exhaust muffler and all
 pulleys.

  My design goal was a FF weight of 170lb, it will be very close, with the
  cooling system still to be added.

  Richard Sohn
  N2071U

  Excellent Richard. A 100 HP O-200 Chinese/Continental  aircraft engine
 weighs
 200 pounds.

  BTW is that a new front cover casting?
  Perhaps it will work on a 2 rotor.

  Paul Lamar

 Richard.

 Great.  I wish I could find a lighter starter for you.  Is the starting
 torque
 significantly less than a two rotor?

 Doug in Japan

 How about the starter from this?

 Paul Lamar


 Doug,

 the required maximum torque is the same as on a two rotor 12A, however,
 the
 total power is less because of only one compression stroke per e-shaft
 revolution. The starter issue is the cranking speed. The rotary likes a
 little more to reliably start under all conditions. I have also been using
 a
 starter from a Suzuki, but the weight difference is negligible.

 The front cover casting is totally different from the MAZDA original. The
 big difference is the cooling cavity is not as deep as the two rotor
 version, however, it may still be sufficient for a two rotor if it is run
 at
 moderate power. Say under 250hp. Another difference is the oil system,
 which
 has considerably smaller cross sections in the galleries.
 Since I am using the stationary gear on this end, everything else is
 pretty
 much the same as the original.

 Richard Sohn
 N2071U

Here is a copy of an earlier email to the group on the weight. I is the
latest.
"
 Got the engine complete, and it is coming out at 148lb. It includes
 starter, alternator, redrive, carburetor, exhaust muffler and all
 pulleys.

 My design goal was a FF weight of 170lb, it will be very close, with the
 cooling system still to be added.
"

Richard Sohn
N2071U
www.fairpoint.net/~res12/home.html


Followed a post on u-tube where they used an outboard starter.
As I recall - about 1/2 the weight.  Starter was from a 150 hp.

Dan F