> > This a reply to Jerry about the Tailwind prop, for what ever it might

 be worth.
 >
 > The Hatch rotary engine in my RV-3 delivered about 215 hp at a prop
 rpm of 2700.  The prop I chose
 > was a Pacesetter due to its particularly robust construction in the
 hub and blade shank.  The
 > diameter was 72 inches, and the pitch was 100 inches. Top speed with
 this prop was 238 mph on the
 > cross wind leg of the in 1997 Sun 100.  No nitrous oxide was used for
 that race.
 >
 > Acceleration on take off was a tad slow, but I thought nothing of
 using the high altitude fuel
 > stops - Rawlins, Rock Springs, and Laramie in the heat of the
 summer.
 >
 > I had a prop with slightly less pitch (86 inches) for the Shell 3D
 speed dash.  With the nitrous
 > oxide on I could make it from brake release to 3,300 feet in 45
 seconds - Bohannon's best time was
 > 49 seconds.  The engine was producing about 350 hp.
 >
 > Just for what it is worth.
 >
 > Alan Tolle

 Thanks Alan.

 Just to put that climb rate into perspective that is over 4400 FPM
 right in the jet range. P-ports are the way to go for normally
 aspirated.

 I sure wish we were where you were back then. Everett's untimely
 death set us back years.

 > Paul Lamar

Thanks Alan,  that is just the info I was looking for.    To be
talking about that kind of performance definitely gets the adrenalin
going.  Jerry

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