Mailing List flyrotary@lancaironline.net Message #58542
From: Charlie England <ceengland@bellsouth.net>
Subject: Re: [FlyRotary] Re: First lift off with single rotor
Date: Tue, 10 Jul 2012 13:29:48 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Kent Paser? (Speed with Economy)

IIRC, he said (it's been repeated by the CAFE test guys in California) that *with proper in-cowl exit air handling*, you can actually make the exit slightly smaller than the inlet. (But not too many have been able to achieve that.)


Charlie


On 07/10/2012 11:44 AM, Dwayne Parkinson wrote:
There was a guy who optimized his Mustang for performance.  He wrote a book which I don't recall the title of but it was all about the performance tests and modifications he made and the corresponding speed gains.  Anyhow, he discovered that for his installation the exit should be 1.1 times the intake.  For what it's worth....

Dwayne


From: Richard Sohn <res12@fairpoint.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tuesday, July 10, 2012 10:51 AM
Subject: [FlyRotary] First lift off with single rotor

Analyzed the dimensions of my cowling, and fount the exit openings being about 70% of the inlet openings. Big mistake there. This will be fixed before looking at other options.
 



Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster