I think that I might have missed something along the way, but isn't

there a

residual amount of pressure from the exhausted chamber that goes into

the

intake manifold when the rotor passes the intake port, thus creating a
pressure wave up the intake manifold? Or does a tuned exhaust scavenge

the

last bit of pressure out of the exhausted chamber?

Inquiring(confused) minds want to know.
Brian Trubee

There is a small bit of comunication between intake port and exhaust port on
the current (and peripheral port) Mazda rotary.   But, if it were a major
factor, the new Renesis rotary would be a dud since it has no overlap at
all.  The intake pressure characteristics will look almost identicle to the
current rotary even without the exhaust factor.

 I agree that the exhaust pressure data on the chart under discussion is
confusing, partly because it is hard to separate the intake & exhaust
pressure waveform in parts of the cycle.  Another confusing factor is that
exhaust pressure readings can vary radically depending on configuration of
the exhaust system.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

 
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