Re: Not trying to 'dig-up' the Bernoulli versus Newton debate :0)
- From: "Private" <please@xxxxxxxxxxx>
- Date: Mon, 13 Feb 2006 16:53:18 GMT
"T o d d P a t t i s t" <tpattist@xxxxxxxxxxxxxxxxxxx> wrote in message
news:eta1v19sp5jecj6kjk2nf5f2m4rtebs636@xxxxxxxxxx
"Cecil Chapman" <bayareapilot@xxxxxxxxxxxxx> wrote:
I'm with you on this one... I've long believed that lift has a LOT more of
Newton in it than Bernoulli.
This is roughly equivalent to saying that lift has a lot
more force in it than conservation of energy. It's clearly
got both "in it."
If you think that by saying "Newton" you can think of air
molecules just bouncing off the bottom of an angled wing,
then you think wrong. If you think "Newton" means an
opposite reaction to air being forced down, then you're
right, but then you have to figure out *why* the air is
being forced down, and Bernoulli's conservation of energy
law for fluid flow helps with that more than the mistaken
Newtonian idea above.
--
IMHO Todd has made significant contributions to the cyclic BvsN discussions
here. He is consistent in steering the discussion to the concept of
"conservation of energy". He has helped me in understanding this (thank you
Todd) and I would suggest others do a Google groups search on author to read
many previous similar excellent responses (some long some short) from him.
If these prior responses were combined and edited, I am sure that he could
just repost this stock answer whenever this question reappears.
Most pilots think only in terms of pressure differences acting directly on
the wing and neglect to consider that they also contribute to "accelerating
a mass of air downward".
Happy landings,
.
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