Richard Konnen wrote:

Paul,
  This may be an off question, do the length make a difference depending on
the amount of draw ? What I mean is the amount of vacuum increases or
decreases with a combination throttle position and RPM, at least that has
been my understanding. With this in mind couldn't a vacuum and spring
operated system work instead of hydraulics?
Richard Konnen

I don't think so. Only in so far as the speed of sound changes with 
air density. It mostly changes with temperature as I recall.
Aircraft engines run at wide open throttle 98% of the time anyway.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.