Let's try for an intuitive approach using a flat plate (your hand, for
example). Imagine sticking your hand out the window of a moving car
and "flying" it through the air as most of us have probably done as a
kid until our parents yelled at us.

If you hand is more or less parallel to the ground, you have wind
resistance (drag), but no lift. Tilt you hand slightly upwards and
now the wind strikes the bottom of your palm and forces it upwards
(lift). The reason lift is created is that your hand is deflecting
molecules of air downwards (change in momentum), and the resultant
force is upwards. It's simple Newtonian mechanics.


.........nah........it's water skiing, which has nothing to do with airfoils
(but does illustrate how the flaps help an airfoil at low speeds).

High v, low p on top
Low v, hi p on bottom (relative)

lift

QED

cheers

oz, flight test engineer, Edwards, 1968-71

High v, low p on top
Low v, hi p on bottom (relative)

lift

QED

cheers

oz, flight test engineer, Edwards, 1968-71


you may have been a worker bee for the US Air Force but you don't have a clew
as to the physics behind air foil lift.

High v, low p on top
Low v, hi p on bottom (relative)

lift

QED

cheers

oz, flight test engineer, Edwards, 1968-71


you may have been a worker bee for the US Air Force but you don't have a clew
as to the physics behind air foil lift.


Oops; forgot

.......and assoc. prof of physics, various universities.

Don't have a clew right now, as I am negotiating for a boat. But clues, I have
in abundance.

cheers

oz, who found the answer to his own question of a few weeks ago regarding JAX

bull****.

High v, low p on top
Low v, hi p on bottom (relative)

lift

QED

cheers

oz, flight test engineer, Edwards, 1968-71


you may have been a worker bee for the US Air Force but you don't have a
clew
as to the physics behind air foil lift.


Oops; forgot

......and assoc. prof of physics, various universities.

Don't have a clew right now, as I am negotiating for a boat. But clues, I
have
in abundance.

cheers

Subject: Lift over foils
From: (JAXAshby)
Date: 4/14/2004 6:42 PM Central Daylight Time
Message-id:

bull****.

....appears to be confirmation of what the others were saying regarding the
content of your messages.

cheers

oz, who has copies of proof, if you want to put money in escrow to back up your
mouth (or fingers, in this case)

oz, who has copies of proof, if you want to put money in escrow to back up
your
mouth (or fingers, in this case)


zero point zero proof of knowledge or training in either physics of aero
engineering, OR abundant proof of current mind addled by prior drugs or alcohol
of disease .

oz, who has copies of proof, if you want to put money in escrow to back up
your
mouth (or fingers, in this case)


zero point zero proof of knowledge or training in either physics of aero
engineering, OR abundant proof of current mind addled by prior drugs or alcohol
of disease .

Subject: Lift over foils
From: (JAXAshby)
Date: 4/14/2004 6:42 PM Central Daylight Time
Message-id:

bull****.

....appears to be confirmation of what the others were saying regarding the
content of your messages.

cheers

oz, who has copies of proof, if you want to put money in escrow to back up your
mouth (or fingers, in this case)

bull****.

High v, low p on top
Low v, hi p on bottom (relative)

lift

QED

cheers

oz, flight test engineer, Edwards, 1968-71


you may have been a worker bee for the US Air Force but you don't have a
clew
as to the physics behind air foil lift.


Oops; forgot

......and assoc. prof of physics, various universities.

Don't have a clew right now, as I am negotiating for a boat. But clues, I
have
in abundance.

cheers

High v, low p on top
Low v, hi p on bottom (relative)

lift

QED

cheers

oz, flight test engineer, Edwards, 1968-71


you may have been a worker bee for the US Air Force but you don't have a clew
as to the physics behind air foil lift.


Oops; forgot

.......and assoc. prof of physics, various universities.

Don't have a clew right now, as I am negotiating for a boat. But clues, I have
in abundance.

cheers

oz, who found the answer to his own question of a few weeks ago regarding JAX