flyrotary@lancaironline.net Mailing List Archive

'fraid no quick and easy answer on that, Chris. However here is a URL http://www.grapeaperacing.com/GrapeApeRacing/tech/inductionsystems.pdf

That provides some general guidelines on page 8 of the pdf. It may provide some help.

Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

----- Original Message -----

From: Dennis Haverlah

To: Rotary motors in aircraft

Sent: Tuesday, March 21, 2006 11:14 PM

Subject: [FlyRotary] Re: plenum volume

I've never heard of a magic number for the plenum volume. The one I've constructed for my RX-8 is approximately 150 in cube. It is about 4 inches wide, 2 1/2 in tall on average and 15 inches long. The is measured from the throttle body to where the four runners leave the plenum. The four runners are actually an original RX-8 intake cut off just below the first rotary valve.

Dennis H.

the mallorys wrote:

Is there a magical number for the size of the plenum? Minimum or maximum? I had heard something about 50% of the 1.5l for the engine, but don't know if this applies to the rotary.

Chris