|
|
Chuck Brenner,
It is always fun to compare the performance of my airplane with others,
other than in a racing environment. Maybe it is of interest to other flyers
and to the builders working away out there.
I went out today to try and duplicate your condition of flight to see what
IAS I could come up with. I recorded: 8000 msl, 2500 RPM, 23.25 MAP, 181
KIAS/208.15 MPH, 8 deg.C, a gross weight of about 1435 lbs. I made a steady
state run of five minutes to record numbers, holding altitude to +/- 20 ft.
I have a Lycoming IO-320, Hartzell CSP.
Interestingly enough, I made a return run for five minutes at 2350 RPM, the
MAP was 23.5 (don't know why it is more at less RPM) and the IAS was 179
Kts.
George Shattuck
N320GS
----- Original Message -----
From: "Marvin Kaye" <marv@lancaironline.net>
To: "Lancair Mailing List" <lml@lancaironline.net>
Sent: Monday, January 20, 2003 10:07 AM
Subject: [LML] Re: Lancair 360Cowling Conversion
Posted for CHBAviation@aol.com:
I've just completed a lower cowling modification on a Lancair 360. This
Lancair was pretty quick already, indicating 210 mph indicated at 8,000 ft
at
2,500 rpm. It pulled 21.3" of manifold pressure. The only modification
the
engine had was high compression pistons. I took off the big scoop on the
bottom and the cross over exhaust system. I installed a flush scoop and 4
pipe exhaust system with a K&N air filter. The results are now 220 mph
indicated at 8,000 ft at 2,500 rpm and 22.7-23.0" of manifold pressure.
When
we pushed the nose over to stay out of class B airspace, we hit 300 mph
indicated in a heartbeat in a gentle dive of 1,000 ft a minute. When the
owner returned to OK City from my shop outside of Denver he called me and
reported that he got into a really good tail wind and indicated 225 mph at
2,500 rpm and 23" of manifold pressure. His GPS reported 247 knots!!!
UNBELIEVABLE! He's happy...so am I. Getting ready to modify another this
week. Anyone needing an old "ugly" scoop or wanting more info on this
modification please call 303-261-4466 or email chbaviation@aol.com. I'll
be
relocating to Port St. Lucie, FL area in about 6 months.
Chuck Brenner
CHB Aviation LLC
#############################################################
For archives see the LML website:
http://www.lancaironline.net/maillist.html
LML members receive a 10% discount at http://www.buildersbooks.com
|
|