Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Busting an aerodynamic myth -- Planes don't fly due to Bernoulli Effect

robchalmers · 06-01-2011, 03:58 AM

THANK YOU MR NASA !!!!!!

You STILL seem to be hooked up on Longer line theory or equal transit time being Benoulli law- IT ISN'T!!!!!

Benoulli IS required for flight

to quote
"Bernoulli’s law is derived from the conservation of energy. So in any flow problem, Newton’s laws and Bernoulli’s law are satisfied at the same time … they aren’t added together. "

I'm sorry if I seem a little het up about this maybe its because I too have a degree in Aeronautical engineeering and spent a ****load of time in a wind tunnel. but reading what he says is just dispelling Long line / ETT and not the fact that flight comes the principles of Benoullis law.

Next go to this Nasa link
http://www.grc.nasa.gov/WWW/K-12/airplane/foil3.html

and put in 0 degree angle of attack and mess with the camber and chord%

See what happens when you try a flat bottomed wing, -3.5deg AoA,8%camber, 11.5% chord thickness

a) flow lines (deceptive because they seem to show ETT) - but there is UPwash
b) lift generated (1239lbs)

06-01-2011, 03:58 AM	#58 (permalink)
robchalmers Master EcoModder Join Date: Jun 2009 Location: UK Posts: 659 Chug - '96 Volkswagon Polo CL TEAM VW AUDI Group 90 day: 49.42 mpg (US) L'Autre - '03 Renault Megane Sport Tourer Expression Diesel 90 day: 45.02 mpg (US) Thanks: 20 Thanked 12 Times in 12 Posts	THANK YOU MR NASA !!!!!! You STILL seem to be hooked up on Longer line theory or equal transit time being Benoulli law- IT ISN'T!!!!! Benoulli IS required for flight to quote "Bernoulli’s law is derived from the conservation of energy. So in any flow problem, Newton’s laws and Bernoulli’s law are satisfied at the same time … they aren’t added together. " I'm sorry if I seem a little het up about this maybe its because I too have a degree in Aeronautical engineeering and spent a ***load of time in a wind tunnel. but reading what he says is just dispelling Long line / ETT and not the fact that flight comes the principles of Benoullis law. Next go to this Nasa link http://www.grc.nasa.gov/WWW/K-12/airplane/foil3.html and put in 0 degree angle of attack and mess with the camber and chord% See what happens when you try a flat bottomed wing, -3.5deg AoA,8%camber, 11.5% chord thickness a) flow lines (deceptive because they seem to show ETT) - but there is UPwash b) lift generated (1239lbs) __________________ ----------------------------------------- good things come to those who wait, sht turns up pretty much instantly twitter.com/bertchalmers Last edited by robchalmers; 06-01-2011 at 04:13 AM..