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Old October 16th 07, 05:04 PM posted to sci.physics,rec.aviation.piloting
Androcles
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Default Airplane Pilot's As Physicists


"Le Chaud Lapin" wrote in message
ups.com...
: On Oct 16, 10:20 am, "Androcles" wrote:
: "Le Chaud Lapin" wrote in
oglegroups.com...
: : On Oct 16, 3:47 am, "Androcles" wrote:
: : "Le Chaud Lapin" wrote in
: glegroups.com...
: : : On Oct 15, 7:54 pm, "Androcles" wrote:
: : : "Le Chaud Lapin" wrote in
: : ooglegroups.com...
: : : : On Oct 15, 6:42 pm, "Gatt" wrote:
: : : : "Le Chaud Lapin" wrote in
: : :
oglegroups.com...
: : : :
: : : : I read last night in another piloting book, again, that
the
: common
: : : belief
: : : : about the dynamics of airfoils is wrong,
: : : :
: : : : Yeah? Which one?
: : : :
: : : : I'd have to go back to bookstore to find the name.
: : :
: : : AHAHAHAHAHAHA!
: : : Or back to sleep to dream again...
: : :
: : : Barry Schiff, in "The Proficient Pilot", "An AOPA Book", writes on
: : : page 2:
: : :
: : : "There is, for example, this amusing fable: "Air flowing above the
: : : wing has a greater distance to travel (because of camber) than air
: : : flowing beneath the wing. Therefore, air above the wing must
travel
: : : faster so as to arrive at the wing's trailing edge at the same
time as
: : : air flowing underneath. This is pure nonsense."
: :
: : Since it is true Schiff must be a raving lunatic. Maybe you don't
: : understand that travelling the greater path in the same time
involves
: : a greater speed.
: :
: : Perhaps you could explain in detail what you mean by this last
: : statement. I am sure that there are plenty of people here would would
: : like, for once, that a pilot explains what s/he means by this.
:
: Really?
: Ok, for plenty of cretins such as yourself...
:
: Travelling 70 miles (distance) in one hour (duration of time)
: is a speed of 70 mph by definition.
: 100 miles (the greater distance) in the same time (1 hour)
: is 100 mph.
: 100 mph is faster than 70 mph.
: People unaware of this simple fact are prone to getting
: speeding tickets and losing their license.
: Aircraft pilots are even more aware of it than motorists,
: using their stop watches to compute distance.
:
: In this video the air moves MUCH faster over the top of the wing
: than it does over the bottom:
: http://www.youtube.com/watch?v=KCcZyW-6-5o
:
: I just looked at this video.
:
: What you wrote and what this video demonstrates are two entirely
: different things. There is no reason to say that the air moving above
: the wing must meet beneath the wing.

What do you think it meets, water?



:
: I keep hearing people say,
:
: "The air moves faster, therefore Bernoulli's Principle must be
: invoked."

That's right.

:
: The thesis of what I have been saying all along can be seeing in an
: inversion of this sentence.
:
: "It is Bernoulli's principle that causes the air to flow faster."

Oh sure... and it is falling that causes gravity and losing that
causes cretins to buy lottery tickets.

As the other person said, your entertainment value is zero.

*plonk*