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
>
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