Hi Ya'll,
I have been away for a while so don't know how long this has been going on.
Good seems to be it has created action!
Topic is lageled Wing Tip Vorticies but that seems to have drifted into how an
airfoil (wing) creates lift which awakens me.
First know I have been a student of Aerodynamics for 70 odd years, that is
with miniature flying aircraft. In all that time I have never seen a understandable,
reasonable explaination of how lift is created.
Some of you people seem to have explainations but to me they are complex
and a bit confusing so hard to accept.
An old adage says solutions to mysteries usually are symplixtic and quite often
just plain common sense. Have found that adage suits much in aerodynamics
Experience has led me to a common sense way that lift is created that I have
never seen broadcast.
Would be interesting to see your thoughts regarding it.

Fore notes on which this therory is based>

Aerodynamics is the science of objects moving through air
which implies that the air is stationary and the wing moves throuh it.
\
An object moving through a liquid displaces it and such movement creates a force

Air is composed of seperated molecules which can be compressed closer together
The molecules tend to return to their origional spacing when the compression
device moves on.

Compressed air can have considerable force. A tire inflator has much force at the
nozzel and at a short distance from it the compresion has disipated, molecules have returned to origional spacing

With those thoughts consider>

A stationary wing does nothing but create weight.

A moving wing displaces air, in the process compreses the molecules.


With its movement the wing compresses the air before it, creating a force.

The wing is flying at an angle of attack

At the airfoil leading edge air is seperated to pass above and below it
This is compresed air containing force

The lower airfoil side is at a positive angle so the airstream passing it exerts its
stored energy against the airfoil bottom creating a positive upward ptessure on
the foil.

The upper curve of the airfoil, being a curve, further compresses the air until the
curve moves in the opposite direction.

Stored energy from the compression has inertia.

When the upper airflow reachs the foil "high point" the inertia tends to cause
the air to follow it's previous path, thus the airstream leaves the airfoil.

When the inertia force disapates the air molecules return to there origional spacing.

The area between where the air leaves the foil and where it returns is a low
pressure zone.

Sherlock to Watson.> high pressure always moves to low.

Common sense would believe this therory, your comments and observations
would be most interesting

Note> this thinking was brought about by the stucy of an excellent photo of
an airfoil in a smoke tunnel.
Smoke was pure white so discoloration was eazy to observe
What was noted was the white smoke entering the photo gained a greyish tint
as it approached the airfoil. The grey held in some amount until the smoke took
the downward turn on the upper side.

The smoke molecules intersperce with the air molecules, reside between the air
molecules, The color change would suggest the compression also effects the smoke, closer together more color?

Ain't this fun?


Hal [email protected]