October 26th 07, 07:21 AM
posted to sci.physics,rec.aviation.piloting
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Airplane Pilot's As Physicists
jon wrote in
oups.com:
On 16 Okt, 20:41, Jim Logajan wrote:
Thomas wrote:
You may want to check out my web pages
http://www.physicsmyths.org.uk/bernoulli.htmand
http://www.physicsmyths.org.uk/drag.htm for a closer examination of
the physics behind the aerodynamicliftand drag.
You might want to actually _include_Bernoulli'stheorem somewhere in
your pages. You talk aboutBernoulli'sequation,Bernoulli'sprinciple,
andBernoulli'slaw. And yet none of them are actually presented. Are
you saying they all the same or all different? Why not use the
terminology used by the professionals and stick with
"Bernoulli'stheorem"? How about including references to relevant
texts on your pages? It's not like serious texts and lab experiments
haven't been done on the subject for a zillion years. It helps to
show you know what you're talking about by showing you've first read
the professional literature on the subject and done your own relevant
research.
You might also want to redraw your figures so they include vertical
labeled arrows. Then present the assumptions and math needed to show
your work and why you think the vertical magnitudes sum to zero. Just
saying they do, or they only yield a torque, isn't good enough. It is
more useful to _show_ - not pontificate and hand-wave.
P.S. Chapter section 40-3 in volume 2 of Feynman's Lectures on
Physics is as good a place as any to start.
Nobelprizewinner Feynman made a good statement about the fluid
Bernoulli equation was valid for, "ideal fluid".
Feynman called the perfect fluid for "dry water" and it did not
exsist i a real world, only the mathematical world.
You're an idiot.
Bertie
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