Archived posting to the Leica Users Group, 2002/03/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]And people get pissed off for not getting any answers to their questions. - --- Ernest Nitka <enitka@twcny.rr.com> wrote: > Doug - many many thanks - I can now go onto other > puzzles > > ernie > -----Original Message----- > From: owner-leica-users@mejac.palo-alto.ca.us > [mailto:owner-leica-users@mejac.palo-alto.ca.us]On > Behalf Of Douglas > Herr > Sent: Wednesday, March 06, 2002 2:14 PM > To: leica-users@mejac.palo-alto.ca.us > Subject: RE: upside-down airplanes (was: [Leica] > Optical Question) > > > 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. > > > -- > > > Doug Herr > Birdman of Sacramento > http://www.wildlightphoto.com > > > -- > To unsubscribe, see > http://mejac.palo-alto.ca.us/leica-users/unsub.html > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html __________________________________________________ Do You Yahoo!? Try FREE Yahoo! Mail - the world's greatest free email! http://mail.yahoo.com/ - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html