This is a project that will be assembled in three weeks for an attempt
on the Reno unlimited class. It uses a direct drive unducted fan.
The big block is about 600 cubic inches with special steam pocket

vents

added to the cylinder heads. I found this project at Montgomery field

in

San Diego. They are estimating 800 HP for the engine. I tried to talk
them into a turbo 3 rotor but no luck so far. They do appreciate
the role weight plays in a Reno unlimited race where the airplane is
pulling a constant 2.5 G's. Induced drag due to lift is the main

problem

at Reno and that is why brute HP wins. To pull two G's you
need twice the lift coefficient. Induced drag is proportional to
the lift coef squared all other things being equal so you need
four times as much HP. An engine like the big block is a handicap
due to the high weight compared to a turbo 3 rotor.

The blade shown is one of four total.

Paul Lamar

Paul, the owner of "Jaw Breaker" has an engine like that he would like

to

sell. He spent over $100K on it, but now his plane is history (crashed

this

year at S&F)
bulent

Here are some more pictures.

Paul Lamar

Vance W Jaqua wrote:

It looks like they are really a long way from being ready, and it is tough
to
tell what the aerodynamics are going to look like. Rather than being too
heavy, I think they would be too small. If you are going to race with the
big boys in a small plane you better be able to fly well upside down
since that is where you would be when you tried to pass one of those
3350 cu in flying anvils. The rotary powered plane would probably
suffer even more in that case. If you do not have 2000HP and 3000+
lbs of plane, you better stay home. - Vance

 
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