BTW; this is with the 9.0:1 compression
rotors, and induction and exhaust designed for packaging without consideration
for tuning. So there are likely some more horses in there if you can work
at getting them out.
Al
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Al Gietzen
Sent: Tuesday, March 06, 2007 8:58
AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 20b vs. Renesis
for Lancair ES?
Al G dynoed his 20B at 295 hp @ 6800 RPM if I remember
correctly. (might have been 285) Al chime in if you see this. The 20B is 50%
bigger. (or 1/3 if you prefer) The engine simply doesn't have to be as highly
stressed to produce power. For the ES GET THE 20B.
You
remember quite correctly; 290 @6800 (sea level, std day, and all that).
More important to me with 2.17 : 1 re-drive, it’s about 265 hp at 6300
(2900 at the prop), and 200 at an easy cruise rpm of 4800. That engine should
go many hours at those conditions. If you want more horses, go with 2.85:1
re-drive.
All
up FWF weight (w/o prop) is about 425# including coolant and radiators.
I
have no first hand experience with the Renesis; but for an ES, I’d go
with the 20B.
Al