Al Gietzen wrote:

Paul;

I know there seems to be some controversy over displacement; but I have in
my notes from some previous posting that the volume pumped by 1 rotor is 1.3
liters (79.3 cu in)per revolution (three revs of output shaft).  I get from
this an intake airflow for my 3-rotor of 275 cfm at 6000 rpm.  Sound right?

Thanks
Al Gietzen

I think the two rotor is 1.3 L. It pumps the same amount of air
as a 1.3 L two stroke. Since the two rotor is like a 2.6 L four stroke
use this chart to check. For a one rotor use 1.3 L to enter this
four stroke chart. Confused yet? :-) Don't listen to Vance :-)

Looks like about 105 CFM for a one rotor at 6000 RPM or 315 CFM for the three
rotor. The chart is for 80% V.E. so for 100% V.E. with porting and proper tuning
figure about 400 CFM.

The chart is from Hughe Macinnes book on turbo chargers.
(I get no kick back on these books! Really!)

Paul Lamar
 
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