> > Ed Klepeis wrote:
     > >
     > > Dear Paul
     > > A major after market alum pulley mfg. says in there catalog claim

that

     > you will get 2.7 hp gain for every pound you lose from the crank

pulley what

     > is your take on this claim. I know on the
     > > subaru eng we can lose approx 5lbs on the crank pulley by going

to an alum

     > pulley. I have a pulley already for the 2.5L subaru but I'm

thinking about

     > having an alum undersize 4 or 5 grove pulley
     > > made up for the rotary if there is enough call for it.
     > >
     > Regards
     > >
     > Ed Klepeis
     > >
     > techwelding@comcast.net

     > Perhaps if you take into consideration the rotational inertia
     > and you measure the HP in terms of engine acceleration. In an

aircraft

     > engine that runs at constant RPM it is not applicable.
     >
     > Paul Lamar

     Shawn Baumgartner wrote:
     >
     > Finally someone who understands what light weight pulleys will do!

I guess

     > it takes aviation people to figure it out. God bless aviation

junkies! I'm

     > one too but I have not taken the step to fly by my own hands yet.
     >
     > Thanks,
     > Shawn Baumgartner
     > President & Sales Director
     > Unorthodox Racing Inc.
     > Phone: 631-586-9525 x.16
     > Fax: 631-586-2599
     > www.unorthodoxracing.com

John Vlake wrote:

For rabbit starts off the line and very quick throttle reaction it's

great,however you're taking away a very fine tuned harmonic vibration
damper! Put a larger light pulley on the alternator,it will

charge plenty on half the revs! John vlake

-Shawn Baumgartner wrote:

The factory crank pulleys on any models we manufacture pulleys for are NVH
dampers for audible noise control for accessory cycling noises that would be
heard in the occupant compartment of an automobile. There is no engine
protection function whatsoever.

Respectfully,
Shawn Baumgartner
President & Sales Director
Unorthodox Racing Inc.
Phone: 631-586-9525 x.16
Fax: 631-586-2599
www.unorthodoxracing.com

The rotary does not need nor does it have a torsional harmonic vibration
damper. The torsional resonant frequency is near infinity when compared
to a wet spaghetti crankshaft. One huge advantage of the rotary over 
the piston engine.

Paul Lamar

The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.