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Bernouli or Newton also Fly in!

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dpfisher(at)scottsbluff.n
Guest

Posted: Sun May 16, 2010 7:41 pm Post 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:

 	  Quote: 	
		  Subject: Re: 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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kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Tue May 18, 2010 6:09 pm Post subject: Re: Bernouli or Newton also Fly in!

Now THIS is the kind of post I wanted to break off of the Zenith list for!

Thank you, sorry but my Daughter is graduating that same day.

I like the long wing and VG idea though!



Kevin

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