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rampil
Joined: 04 May 2007
Posts: 870
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 Posted: Sun Dec 28, 2008 3:21 pm Post subject: Prop Efficiency |
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Hi All,
Bud was bemoaning the lack of data on Europa props.
Here is a short article on how to estimate prop performance
by John Lowry:
http://www.avweb.com/news/airman/182418-1.html
Lowry is the author of Performance of Light Aircraft (1999)
published by the American Institute of Aeronautics and Astronautics.
(yes, you could say the book is authoritative).
Sorry Gary, more numbers! Happy New Year!
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_________________
Ira N224XS |
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Gilles.Thesee(at)ac-greno
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| Posted: Sun Dec 28, 2008 5:10 pm Post subject: Prop Efficiency |
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rampil a écrit :
| Quote: | http://www.avweb.com/news/airman/182418-1.html
Lowry is the author of Performance of Light Aircraft (1999)
published by the American Institute of Aeronautics and Astronautics.
Great book indeed, for the mathematically inclined minds. Bought it 4
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years ago.
Unfortunately, the Bootstrap approach is more difficult to implement
with a constant speed prop.
Season's greetings,
Best regards,
--
Gilles
http://contrails.free.fr
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rampil
Joined: 04 May 2007
Posts: 870
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budyerly(at)msn.com
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| Posted: Sun Dec 28, 2008 7:40 pm Post subject: Prop Efficiency |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Ira,
Great article on trying to simplify prop performance estimates. I spent the morning today going through my prop stuff looking to do the same. Nothing simple about it, it is all time consuming and laborious. It's a lot more fun to fly, especially with the reduction in gas prices. In the past, I had never ran across Lowry's in my search of the NACA/NASA sites or book sites, but then again, the last time I actually had a new text book in my hand was 30 years ago. Now with my son Eric in Aero at Central Florida, I am disturbed that none of their texts reference much about old technology stuff like propellers used in general aviation.
See you at SnF if you can make it...
Bud
P.S. It was 82 at the shop today. Wanted to turn the air on.
[quote] ---
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fklein(at)orcasonline.com
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| Posted: Sun Dec 28, 2008 9:49 pm Post subject: Prop Efficiency |
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On Sunday, December 28, 2008, at 07:33 PM, ALAN YERLY wrote:
| Quote: | P.S. It was 82 at the shop today. Wanted to turn the air on.
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Geez...and I was stackin a freshly cut cord of seasoned firewood (in
the snow)...
Fred
do not archive
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
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ptag.dev(at)tiscali.co.uk
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| Posted: Sun Dec 28, 2008 11:41 pm Post subject: Prop Efficiency |
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That's why for four years with the MT Constant Speed Prop the Jabiru
Factory steadfastly refused to provide any power graphs or curves
relative to MAP for the 3300 engine because it would highlight the
truth!
Compliments of the season Gilles.
Bob H G-PTG
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ptag.dev(at)tiscali.co.uk
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| Posted: Sun Dec 28, 2008 11:41 pm Post subject: Prop Efficiency |
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Hi! Alan
How come your gas prices have come down ?
Regards
Bob Harrison
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