waawamellon wrote:Oh yeah air foils... those are the thingys on the wings that give them that sort of tear drop shape! because they make higher air preasure under and lower air preasure on top.
Am i wrong?
This is a perfectly legitimate thing to bring up, and I used to wonder about it all the time. As it turns out, the real problem here was that the "classic Bernoulli" most of us learn below the uni level isn't really the full explanation for how a wing generates lift. It really doesn't have much of anything to with the shape generating a pressure gradient. A wing just pushes a heck of lot of air downwards when it moves through the air, and the lift on the wing is just the -d(momentum of air pushed)/dt, i.e. conservation of momentum.talicoa wrote:Thinking about this with a simple airfoil, the benefit seems to be in part driven by the different velocities of air over the top wing and the slower air under the wing. That's where the comment of putting covering on the bottom of the wing comes from. Keep that air in a straighter line and there is less distance to travel and a lower speed/higher pressure. This is classic Bernoulli.
Users browsing this forum: No registered users and 1 guest