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Brownsville California Photos - Inspiration

 
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Speedy11(at)aol.com
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PostPosted: Mon Aug 16, 2010 6:41 am    Post subject: Brownsville California Photos - Inspiration Reply with quote
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
Quote:
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 (at) 6.5 GPH, and
202 MPG (at) 7 GPH. At the 5.5 GPH, that's about a 1300 mile range less reserves.
Coupled with the 3000+ FPM climb solo

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wpaulin(at)usa.net
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PostPosted: Mon Aug 16, 2010 8:34 am    Post subject: Brownsville California Photos - Inspiration Reply with quote
Airspeed calibration error .... or drag?

BIll

On Aug 16, 2010, at 7:36 AM, Speedy11(at)aol.com (Speedy11(at)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
Quote:
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 (at) 6.5 GPH, and
202 MPG (at) 7 GPH. At the 5.5 GPH, that's about a 1300 mile range less reserves.
Coupled with the 3000+ FPM climb solo

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