The Penny Flutter test....aero theory....
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
It's just kinda funny, was taught this in school and been thinking this way for 30 years, then all of sudden you learn different. The theory I was taught was the wing was longer at the top making the air pass over the top faster to reach the back at the same time the air going under the bottom does. Who says the air has to meet at the back of the wing at the same time ? 
Allot of unproven theory and bs out there you have to watch it
Allot of unproven theory and bs out there you have to watch it
Pro
Joined: Jan 2006
Posts: 548
Likes: 0
It's just kinda funny, was taught this in school and been thinking this way for 30 years, then all of sudden you learn different. The theory I was taught was the wing was longer at the top making the air pass over the top faster to reach the back at the same time the air going under the bottom does. Who says the air has to meet at the back of the wing at the same time ?
Allot of unproven theory and bs out there you have to watch it
Allot of unproven theory and bs out there you have to watch it
Intermediate
Joined: Jul 2008
Posts: 29
Likes: 1
From: Commerce Twp. Michigan
http://en.wikipedia.org/wiki/Kutta_condition
At low angles of attack, the flow over the upper and lower surfaces do meet at the trailing edge at the same time. However, at higher angles of attack the Kutta condition breaks down. See this NASA high angle of attack airfoil flow visualization:
http://history.nasa.gov/SP-4103/p531.jpg
Notice that when the flow separates on the upper surface the lower surface flow wraps up and around the trailing edge.
