Today's Message Index:
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1. 07:41 AM - Re: Brownsville California Photos - Inspiration (Speedy11@aol.com)
2. 09:34 AM - Re: Re: Brownsville California Photos - Inspiration (William L. Paulin)
Message 1
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| Subject: | Re: Brownsville California Photos - Inspiration |
Matt,
I must be doing something wrong because my IO-390 powered RV-8A numbers
aren't even close to yours.
At 7K', to get 177 KTAS (204 MPH TAS) I have to burn 10.2 GPH and turn 2450
RPM. I can get 3000 FPM climb, but only to pattern altitude. Enroute
climb at 145-150 KIAS produces only 600 FPM. I've climbed to 15.5K' and I'm
planning a test flight to FL240 - to see if it will make it.
I have Bower's ram air and a MT 3 blade - both of which should help with
high altitude performance.
I'm planning a trip from FL to VT in 2 weeks, so I'll see how my cruise
numbers are after that flight.
But, with the numbers I have now, I'm nowhere near your numbers.
I wonder why?
Stan Sutterfield
rv-8a.net
On the way home, I had the IO-390 engine dialed in at 7000ft, 22.4" MP /
2200 RPM and 204 MPH True at 8.8 GPH. Earlier in the week I took it to
18,000ft
(on oxygen) and was seeing 170 MPH True at 5.5 GPH, 192 MPH @ 6.5 GPH, and
202 MPG @ 7 GPH. At the 5.5 GPH, that's about a 1300 mile range less
reserves.
Coupled with the 3000+ FPM climb solo
Message 2
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| Subject: | Re: Brownsville California Photos - Inspiration |
Airspeed calibration error .... or drag?
BIll
On Aug 16, 2010, at 7:36 AM, Speedy11@aol.com wrote:
Matt,
I must be doing something wrong because my IO-390 powered RV-8A numbers
aren't even close to yours.
At 7K', to get 177 KTAS (204 MPH TAS) I have to burn 10.2 GPH and turn
2450 RPM. I can get 3000 FPM climb, but only to pattern altitude.
Enroute climb at 145-150 KIAS produces only 600 FPM. I've climbed to
15.5K' and I'm planning a test flight to FL240 - to see if it will make
it.
I have Bower's ram air and a MT 3 blade - both of which should help with
high altitude performance.
I'm planning a trip from FL to VT in 2 weeks, so I'll see how my cruise
numbers are after that flight.
But, with the numbers I have now, I'm nowhere near your numbers.
I wonder why?
Stan Sutterfield
rv-8a.net
On the way home, I had the IO-390 engine dialed in at 7000ft, 22.4" MP /
2200 RPM and 204 MPH True at 8.8 GPH. Earlier in the week I took it to
18,000ft
(on oxygen) and was seeing 170 MPH True at 5.5 GPH, 192 MPH @ 6.5 GPH,
and
202 MPG @ 7 GPH. At the 5.5 GPH, that's about a 1300 mile range less
reserves.
Coupled with the 3000+ FPM climb solo
*********************************
William L. Paulin, Ph.D.
PaulinNeal Associates
1575 South Forest Drive
Prescott, AZ 86303
Cell +1 858 722 2905
Office +1 760 720 2905
Europe +358 40 720 4047
wpaulin@paulinneal.com
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