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bbreckenridge(at)gmail.co
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 Posted: Wed Apr 18, 2007 8:27 pm Post subject: High Altitude Performance |
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With the RV-10's estimated Ceiling at 24,000ft with the 260hp
(non-turbonormalized of course), I'm just wondering what altitudes
many of you flyers are cruising at on long trips? And, do you notice
a peak in response, handling or performance at a certain altitudes?
Given a long 4 hour leg and the perfect day (ok, a nice tail wind at
all altitudes), would you pick a certain flight altitude and why?
Curious in Clackamas,
Bruce
40018 Wings forever
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jesse(at)saintaviation.co
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| Posted: Mon Apr 23, 2007 5:01 am Post subject: High Altitude Performance |
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Bruce,
N256H has flown as high as 22,000ft, but it didn't like it that high
(indicated airspeed was almost at the stall speed). It likes flying as high
as 18,000ft very much, and it is easier not going over that anyway for
Oxygen and IFR reasons. If I were to pick a flight altitude for a long
flight, with no wind or a constant tailwind, I would go 17,000-18,000
because you can get really nice fuel economy (7.5gph with TAS around 155Kts
- over 20Nmpg). With a constant headwind, I would probably go a little
lower and a little faster (maybe 12,000-14,000ft) so I would not be pushing
the wind for as long.
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
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flysrv10(at)gmail.com
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| Posted: Mon Apr 23, 2007 5:51 am Post subject: High Altitude Performance |
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Good info. Thanks.
do not archive.
On Apr 23, 2007, at 9:01 AM, Jesse Saint wrote:
[quote]
<jesse(at)saintaviation.com>
Bruce,
N256H has flown as high as 22,000ft, but it didn't like it that high
(indicated airspeed was almost at the stall speed). It likes
flying as high
as 18,000ft very much, and it is easier not going over that anyway for
Oxygen and IFR reasons. If I were to pick a flight altitude for a
long
flight, with no wind or a constant tailwind, I would go 17,000-18,000
because you can get really nice fuel economy (7.5gph with TAS
around 155Kts
- over 20Nmpg). With a constant headwind, I would probably go a
little
lower and a little faster (maybe 12,000-14,000ft) so I would not be
pushing
the wind for as long.
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
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Ray.R.Doerr(at)sprint.com
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| Posted: Mon Apr 23, 2007 5:56 am Post subject: High Altitude Performance |
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I flew from Kansas City to Sun N Fun at 11,500. MAP was 19.5" and ran 2200 RPM burning 9 GPH, OAT was 38 F. True airspeed was 140 Kts and with the 50 Kts tail wind, I was getting 190 kts ground speed. I still don't have my main wheel fairings and gear legs. This was a nice super econ cruise. Made the 920 nm trip in 5.5 hours, one stop.
Thank You
Ray Doerr
40250
N519RV (242 on the Hobbs)
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