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Leland Collins
Joined: 10 Jan 2006 Posts: 21
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Posted: Sat Apr 01, 2006 8:29 pm Post subject: High Altitude Climb Performance |
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Today we had some clear weather over central California so I decided to
try my new oxygen system and see how high I could fly. The climb rate at
a density altitude of 16,300 ' was 500 feet/minute. (The density
altitude was close to the pressure altimeter reading.) The true airspeed
at that point was 115 mph, and the climb rate rate would probably have
been higher at the listed Vy of 95 mph. I don't doubt that it could
have climbed to 18,000 '. I have a stock O320D1A in a 9A with a Catto
66x70 3-blade propeller. Catto designed the prop for 187 mph at 2750
rpm. Using the 3-direction GPS method, I earlier measured 188 mph at
2750 rpm. Taking off today from a 400 foot elevation airport gave a 2000
foot/minute climb rate. Flew solo with 30 gallons of fuel
Just as an aside, I mounted the oxygen cylinder on the back of the flap
housing with the valve just above the cross-over bar. It was a bear to
adjust the flow-rate valve, even with my long arms. It would have been
easier if I had an autopilot while twisting and reaching for the valve.
Leland
N137LC
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_________________ Leland
RV9A
N137LC |
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trigo(at)mail.telepac.pt Guest
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Posted: Sun Apr 02, 2006 4:13 am Post subject: High Altitude Climb Performance |
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Leland
Could you publish some photos of your new oxygen system?
Thanks
Carlos
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Leland Collins
Joined: 10 Jan 2006 Posts: 21
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Posted: Mon Apr 03, 2006 8:18 am Post subject: High Altitude Climb Performance |
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Carlos, the mounting of my 13 cubic foot Aerox O2 system is pretty
simple. The bottle sits on the floor of the baggage compartment and is
attached to the back of the flap motor housing with two clamps. One
clamp came from a defunct CO2 bottle and the other is a large hose
clamp. I drilled through the clamps and the housing and attached them
with #10 flat head screws and nuts. I'll email you some photos.
Leland
Quote: | Time: 05:13:16 AM PST US
From: "Carlos Trigo" <trigo(at)mail.telepac.pt>
Subject: Re: High Altitude Climb Performance
Leland
Could you publish some photos of your new oxygen system?
Thanks
Carlos
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_________________ Leland
RV9A
N137LC |
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