Mailing List flyrotary@lancaironline.net Message #49938
From: MONTY ROBERTS <montyr2157@windstream.net>
Subject: Re: [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A. Renesis to turbo
Date: Tue, 9 Feb 2010 17:55:13 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Al,
 
5-6 more than he got or 5-6 more than base line?
 
You also have to take into account that prop efficiency falls off pretty steeply with increased speed and rpm. Especially if the tips start to go transonic. There are some airplanes out there with CS props that will go slower with the engine at redline, even though the engine is making more power, because the prop is eating all of the extra and then some.
 
Hate to see you selling your plane, she's a beauty. Wish I had the dough. Looking forward to the next project...there will be a next one won't there ;-). 
 
Monty
----- Original Message -----
From: Al Gietzen
Sent: Tuesday, February 09, 2010 5:47 PM
Subject: [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A. Renesis to turbo

Subject: [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A. Renesis to turbo

 

Hp = C*V^3

 

Is that simple enough?

Simple enough – and with some other numbers Ed gave I compute he should get 5-6 kts more top end.

Al



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