Archived posting to the Leica Users Group, 2002/03/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Are you talking about compression lift? John Collier wrote: > > Big jet airliners do not fly by creating a vacuum above their wings. Wings > are giant air pumps forcing enormous quantities of air downward. There was > an interesting article in Discover magazine on this very issue. > > John Collier > > > From: "Douglas Herr" <telyt@earthlink.net> > > > > Ernest Nitka wrote: > > > >> why is that airplanes can fly upside down - if > >> flying upright caused a vacuum just above the wing > >> creating lift then flying upside down should cause > >> the wing to move down. This has bothered me for > >> near on 2 decades. I get bothered easily > >> > >> ernie > >> > > > > The airplane's wing is designed to produce lift efficiently at it's normal > > angle of attack but it can produce additional lift inefficiently by increasing > > the angle of attack (until it stalls). The upside-down airfoil relies on a > > high angle of attack to produce lift but does so very inefficiently. > > > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html