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1. 08:41 PM - Bernouli or Newton also Fly in! (Dave and Pam Fisher)
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| Subject: | Bernouli or Newton also Fly in! |
Hi Guys!
Interesting discussion!
As I understand it, some airfoils produce lift , others suck! OK!
OK! Put me in the combination camp! I'm thinking that a sailboat sailing
dead away from the wind is pure " power by Newton" and can't exceed the
speed of the wind. A well designed sailboat on a tack, however, can exceed
the speed of the wind thanks to the Bernouli induced increased speed of the
airflow across the curved part of the sail: The reduced pressure around
the curve of the sail on a tack beats the high pressure area in front of a
sail running dead away from the wind.
I think that an airplane in flight is most like a sailboat on a tack and
the "Bernouli effect" helps the " barn door effect" pump a mass of air down
and to the rear. The down component of the airflow mass must equal the
weight of the airplane or the thing wouldn't stay aloft. The rearward
component gives the airplane speed relative to the air mass. Thank you!
Newton!
That said, I know nothing about sail boats and I've forgotten most of what
I ever knew about engineering! ( Old Fart ) !!
For any one within range of Scottsbluff, Nebraska, please join us for a
fly in Saturday, June 5th from 7:00 AM to 2:00 PM at BFF sponsored by EAA
Chapter 608. Flyers are available. Just ask!
Dave Fisher, 701 SLOW build with VGs, long wings, and A-80 Continental
308-783-1035 or 308-641-5755
At 12:58 AM 5/16/2010, you wrote:
>Subject: Re: Zenith701801-List: Bernoulli or Newton?
>
>As for Bernouli or Newton---- read link below
>
>http://hyperphysics.phy-astr.gsu.edu/HBASE/fluids/airfoil.html
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