Ken Welter wrote:

  From day one I have been running a smaller racing beat crank pulley
as I was told that you need to slow the water pump down to stop
cavitation but I am using  Evans coolant and they say you can speed
up the water pump with there coolant without cavitation so I wanted
to know what most of you that are flying are running for a pulley.
--
Ken Welter

I might add Ken is using a 2.93:1 (or there abouts) gear box so he runs
his engine faster than most everybody else. Up to 8000 RPM.

Paul Lamar

My main pulley is from Racing Beat (double sheave) they do not specify the
diameter (and I have not measured it), but claims it reduces speed of
alternator (on which I have another pulley designed to reduce alternator
speed) and water pump speed by 20%.  My alternator my be running at 30-40%
below normal speed with the two speed reduction pulleys.  I have wondered
whether this 20% drop in water pump speed means that if I went back to a
stock pulley I would get 20% more cooling.  But, since I get more than
adequate cooling - just have never tried it ti see the difference it would
make.

Ed Anderson
Matthews NC

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org