Archived posting to the Leica Users Group, 2002/03/06

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Subject: RE: upside-down airplanes (was: [Leica] Optical Question)
From: Henry Ting <henryting10@yahoo.com>
Date: Wed, 6 Mar 2002 11:45:32 -0800 (PST)

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
> 
> 
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Replies: Reply from Javier Perez <summarex@yahoo.com> (Re: upside-down airplanes (was: [Leica] Optical Question))