Hey Paul,

 I was reading some of the "tech tips" on the racing beat website and
 wanted
 to ask your opinion about theirs recommendations for "Race
 Clearancing of
 Rotors" and "Double Side Seal Springs".  I had heard of Rotor
 Clearancing
 previously but not the use of 2 springs under each side seal.   What
 do you
 think about these mods for aviation applications where the engine
 will run
 at a continuously between 6000-7000 ?

 Don

 The racers are running the engines to 11,000 RPM with well over
 300 HP available in two rotor form.

 450 to 500 HP is rather common in street turbo charger form. The
 really fast guys are getting 800 to 900 HP out of a two rotor
 running alcohol and NOS.

 In our case the engine is loafing. We could not afford the
 fuel burn of a 300 HP engine. BSFC would be about .52 to .53
 or 159 pounds per hour or about 25 gallons an hour.
 At say an optimistic 250 mph that would be 10 miles per gallon :)

 BTW did you try to load that email file I sent in Outlook Express?

 Paul Lamar


Thanks Paul. Does that mean you are not in favor of these mods for
aviation applications.

I'll try to load the email tonight.  I'm really surprised that this is
not easier

Don

Basically the mods are unnecessary for aircraft use. We treat our
engines much better than the racers do.

Don't take this wrong. I am not proselytizing Linux here but it
is easier running the Linux version of Thunderbird.
They have a more comprehensive set of import export tools.
If you look at the left of the screen shot you will see a file
tree showing all email messages back to 1998. All 8 gig.

Paul Lamar