Fred Osborn wrote:

Paul,

I have heard that you feel that a p-port is the best approach for a
single rotor engine. It certainly would be the easiest manifold and
butterfly arrangement. I have read that the p-port doesn't idle well at
low RPM. That is not a major driver of course.

I am not even close to needing a manifold yet but I sometimes like to
get ahead of myself. Looking at the front and rear housings it is quite
obvious that a single rotor engine has quite a bit more intake area than
either rotor in a normal 2 rotor engine. It may even have more area than
several other porting possibilities.

I had thought I might partially build up my single rotor and with no
plugs installed, pulley drive it with an electric motor to try various
intake schemes. The measurement would involve air volume out the plug
holes at various RPM vs tuning. I suppose I could use my #2 rotor
housing for a p-port test. Any input you, or others, might be able to
provide would be appreciated.

Would your CD have much information on single rotor intake arrangements
?

Fred O.

You are going to need all the HP out of that single rotor you can get.
Gets the power to weight ratio up to make it a viable replacement
for an O-200. Hold on a day or two. That 4 rotor tech paper is going to have
some good info on P ports. In the mean time here is a chart from that
paper.

Paul Lamar
 
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