"Mark Oliver" wrote in message ...
The current theory of flight is based upon the Bernoulli's Principal, the
pressure of a fluid (liquid or gas) decreases at points where the speed of
the fluid increases. The airfoil is designed to increase the velocity of
the airflow above its surface, thereby decreasing pressure above the
airfoil. Simultaneously, the impact of the air on the lower surface of the
airfoil increases the pressure below. This combination of pressure decrease
above and increase below produces lift. Pressure is reduced due to the
smaller space the air has above the wing than below. Air cannot go through
the wing, so it must push around it. The surface air molecules push between
the wing and outer layers of air. Due to the bump of the airfoil, the space
is smaller and the molecules must go faster.


THIS HAS A MAJOR PROBLEM - specifically inverted flight. The current theory
of flight utilizing the Bernoulli's Principal is only applicable to normal
level flight. However, we know and observe that inverted flight is
possible. Thus, the Bernoulli's Principal is no longer applicable to
inverted flight, so there must be another theory that supports flight, be it
level or inverted.


The new theory of flight is based upon the new theory of Gravitational
Vector Force (released Sept 2004). Utilizing Newton's laws that equal
opposite force is generated at right angles, be it applied at once or
successively, and if the angle is oblique (slanted) a new force is
generated. Then inverted flight is possible as force is always generated at
right angles, and this is towards the ground in all cases. The net
difference between the initial velocity and resistance force generated at
the leading edge at right angles (downwards) creates a new force called
Gravitational Vector Force, and it travels in the opposite direction
(upwards) to maintain balance, impacting the bottom of the wing. The wing
becomes less efficient in inverted flight due to the design of the airfoil,
however it is still possible.

This new theory of flight also supports the following;
1) the new force manifests at a faster rate than initial velocity, hence the
wing becomes more efficient at faster speeds
2) As you extend spoilers and flaps at the leading and trailing edges, the
bottom of the wing now becomes "cupped" like a satellite dish, and able to
capture more Gravitational Vector Force, creating more lift

You may read more about this new theory at www.threexd.com

I'll probably skip reading it, thanks. Ah, where to start?

One observation.: If "cupping like a satellite dish" helps to increase
the gravitational vector force, then why don't you build an airplane
with a satellite dish shape instead of wings and see if it flies?
Might be a good test for you... I'll stand well clear on the ground
if you please. I don't think you'll get above the runway, but I want
to avoid being near a ground accident.

Bernoulli's theory is an expression of constant energy. The air
stream has pressure and velocity, if the velocity increases, the
pressure decreases unless you do something to add energy to the
airstream. Note that the increased pressure on the bottom of the wing
is less contributory than the decreased pressure on top, unless you're
at a high angle of attack.

Bernoulli is one way to describe what happens to the air passing over
and below a wing. For a more complete description see an aeronautical
textbook. I like "Aerodynamics for Naval Aviators", available from
ASA and other providers. Also the online book "See How It Flies" has
a good description at http://www.av8n.com/how/.

Basically, the wing works by pushing down a large volume of air. The
equal and opposite reaction pushes the plane up. That's the simple
version and to my own mind a much better and less confusing starting
place than Bernoulli.

And, I probably wasted my time replying to this in any case.

-Malcolm Teas