3 ms·
tl;dr The wings pump air down from above, causing lift not through pressure effects but rather from the volume of displacement. (I got a little bit lost in the
by bdamm 11y ago
tl;dr The wings pump air down from above, causing lift not through pressure effects but rather from the volume of displacement.
(I got a little bit lost in the discussion of upwash. It seemed to me that the idea was upwash was less efficient at moving air than downwash, and therefore more air was moved down.)
- nether 11y agoPressure effects still take place. Pressure is just force divided by area. If a net force (lift) exists, then a pressure differential must exist per newton's third law. A flat plate at a positive alpha has both a pressure and speed differential across the upper/lower surfaces, see http://www.windsofkansas.com/AZ2Fig5.jpg http://www.windsofkansas.com/AZ2Fig5.jpg