David Morris wrote:
 

G'day from DMRH.

Reading about that (combi) port idea. Just wanted to clarify things a
little better.

Mazda experimented with the combi port  back in the late 60's-early
70's with the 10A engine's. Not with the 13B engines as the text
suggests.

They were thinking about use in cars where a wide torque band 
and smooth running at moderate RPM's are required.

We have different needs. Nothing below 4000 RPM is of much interest to
us except perhaps the idle.

Incedently a rotary engine workshop tried that idea here in Sydney a
few years back only to find the same results Mazda did. Too complex
for modification from standard-too expensive for custumer-negligable
gain for required effort.

Did they try just bonding the peripheral  port in with epoxy and 
using a butterfly valve up close to the housing?

Word from the inside suggests that Mazda have been playing with 2
different rotary test vehicles & are about to decide which gets the
nod. (probably the best from both cars).

REgards
              Dave Morris

                                          http://www.3rotor.com/dmrh

Have your heard the rumors about a side exhaust port powered SEDAN being
introduced to the U.S. market in Nov 1999? Makes sense. Sedans always
sell
a lot more than a sports car. The RX2 and RX3 sold like hotcakes in
their
day.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org