Archived posting to the Leica Users Group, 2002/03/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Most aircraft can't maintain upside down flight unless the airfoil is symmetrical. The pilot can push up and apply thrust but only for a short while, and a tremendous fuel cost. It's not very stable either. If not don't you think someone would have already marketed upside down airline travel. It's possible to design a fully symmetrical (wing and fuse) that has no preference but the asymmetrical designs are far more aerodynamic. I think some research aircraft are designed like that so sensors on both top and bottom can point up or down without any penalty Javier Henry Ting wrote: > > 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 _________________________________________________________ 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