On May 23, 3:11*am, Dudley Henriques wrote:
BDS wrote:
"Dudley Henriques" wrote
Any article that "discounts Bernoulli" as having anything to do with
lift is incorrect.

I would have thought so too but I tend to put a fair amount of weight on
what Garrison says when it comes to this sort of thing.

You can use either Newton or Bernoulli to explain lift, but the correct
way to explain it is to explain how both are correct.
In other words, anytime you have lift being created you have a Newton
explanation AND a Bernoulli explanation occurring at the SAME TIME!

According to the article where Bernoulli falls apart is in the assumption
that the air flowing over the top of the wing arrives at the trailing edge
at the same time that the air flowing under the wing does, and since it has
further to travel it must be going faster thereby lowering the pressure
above the wing. *The article states that in fact, this is exactly what does
not happen - the air flowing over the wing actually arrives at the trailing
edge after the air flowing under the wing.

BDS

I think I see where this article has gone wrong.

What Garrison is talking about is the equal transit theory, which is
indeed incorrect, but it's CRITICAL that a pilot reading this completely
understand that it isn't Bernoulli that is incorrect, but rather the
equal transit theory that is incorrect. The equal transit theory is
simply a totally incorrect INTERPRETATION of Bernoulli that has been
passed around for eons by CFI's, pilots, and indeed textbooks as well.

It's quite common for someone writing an article on lift to try and make
a distinction that Bernoulli is incorrect by referencing the incorrect
interpretations that have been out here in the community for many years.
Just remember; the incorrect interpretations that misrepresent Bernoulli
are in fact misrepresentations of Bernoulli, NOT proof in any way
whatsoever that Bernoulli's CORRECT theory is wrong.

Spot on. In any case Bernoulli cannot be "wrong" as it it's only an
energy conservation equation.

Cheers