---------------------------------------------------------- Zenith701801-List Digest Archive --- Total Messages Posted Sun 05/16/10: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:41 PM - Bernouli or Newton also Fly in! (Dave and Pam Fisher) ________________________________ Message 1 _____________________________________ Time: 08:41:53 PM PST US From: Dave and Pam Fisher Subject: Zenith701801-List: 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith701801-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith701801-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/zenith701801-list Browse Digests http://www.matronics.com/digest/zenith701801-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.