This 1962 CW 2RC6 looks remarkably like a scaled up 12A except for the 
one side port instead of two. The water pump is in the same
silly place. This was before CW added a center main bearing
to the engine. Another change made by Mazda was to add an oil squirter
to cool the rotor. 

CW also built a peripheral port version of this
engine and achieved a 20% improvement in volumetric efficiency.
110% rather than only 90%. HP on the single rotor P-port version was 
about 125 at 6500 RPM. Since this was a 60 cubic inch per rotor 
engine it was about 40% more displacement than a 12A.

They also build a supercharged version.
For every 2 inches of Hg manifold pressure above atmospheric
HP was up 10%.

On the side port version they got a best BSFC of about .48 between
3000 and 4000 RPM. No BSFC data for the P-port version.

As far as I can tell absolutely no attempt was made to tune the intake 
or exhaust on any of these engines. They all had very short intake 
manifolds.

They also built a four rotor version with a one piece e-shaft and split
main bearings and phasing gears. Only one side port per rotor was used. 
HP was 410 at 6500 RPM, torque was 400 foot pounds at 2500 to 5000 RPM
and BSFC .5 2500 to 4000 RPM.

I scanned this off an original CW document sent to me recently by Don Sherman.

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.