----- Original Message -----
Sent: Friday, April 20, 2007 9:12
AM
Subject: [FlyRotary] Re: Single Rotor
Testing
The
most interesting fact of this test is the possibility of a power
>
estimate. Calculated power using a BSFC of .5 is 30 hp. Looking at the
> power curve of the LeMans engine, this is about 10% below of what
is
> shown there. From this, I believe the projected over 100hp at
7500RPM
> is within reach.
>
> Richard
Sohn
> N2071U
Just looking at a dyno sheet from one of my bridge ported 12As shows
218.2 HP at 7,500
RPM, 152.6 foot pounds, 1517 and 1494 EGT, .673 BSFC, 164 degrees oil,
100.1 PSI oil pressure, and A/F of 12.1.
This engine is not used at that low an RPM so it is not tuned to be ideal
there. It is used between 7,800 RPM (229.4 HP) and 9,600 (242.2 HP) with peak
power at 9,400 RPM ( 244.8 HP).
With a Pport and some work on tuned lengths, perhaps 120 HP at 7,500 RPM.
is available.
Sun&Fun is still ongoing. You all should be there. A Renesis engine
with a Marcotte reduction is under power each day. Art Rudko Lutz Florida.
1-813-792-2787.
Land at Zephyr hills and rent a car. Also buy your tickets at the counter
inside. Free Zephyrhills water in the cooler. Very good.
Lynn E. Hanover
The 4000RPM I am running at is driven by my setup. My
direct drive load prop is not good for much more. In addition, the mixture
ratio is just what the carb is giving me. May be I can find the parts to
better tune it. My final solution is with an adjustable carb, but this is some
down the road after the side housings are settled.