**First published in German, January. 17. 2003
by J. Peter Apel
Revised July, 13, 2004
Translated May, 8, 2008
The physically aerodynamic Base Formula**

A wing not only accelerates air with its bottom down, but by the sloping rear top and its freed up space also with its top side. With the results of this both arise a common effluent of air far-reaching do up and down, the so-called down wash. It is fixed in the air at each position where a plane is moved through.

Flying is generat by a plane, it must provide the required energy, namely, to accelerate air downwards. This determine the coordinate system of flying: it's the air in its continued state without any influence of a plane.

An air flow on an aircraft does not exist. It is the wind of moving, which is a fictitious movement of air. That does not matter for technical, but for physics, in there is an aircraft moving, not the air, just as it can be observed in nature.

The calculation for this lift-force results from the Newton law for forces by constant velocity:

**L = m · delta V _{vertical down wash}**

**S _{air} = wing span · V_{plane}** . . . . . Dimension m

The accorded velocity for the down wash V

The flow of masses per second perpendicular to the plane results with ρ

**m dt = ρ _{air} · S_{air} · V_{plane} · cos α · sin α **

**Total Aerodynamic Force (TAF) = m dt · V _{down wash}**

**_________________________________________****__****__****
TAF = ρ _{air} · S_{air} · (V_{different between plane
and air})^{2} · (sin α)^{2} · cos α**

**L = ρ _{air} · S_{air} · (V_{different between plane
and air})^{2} · (sin α)^{2} · (cos α)^{2}**

Forces emerge in the air only according to the Newton Laws and are airflows that are generated by planes. There is no other possibility to generate dynamic forces. This is also effective when a „stream“ collides with a solid plane: the plane generates identical airflows, exactly the same way the plane would move in the air. Only the perspective is different. For example: the rotor blades of a windmill generate the same down wash in/against the blowing wind like the wings of a glider generate down wash in/against the vertically thermal „wind“.

** The relative event between a plane and air is the same in all cases. **

These formulas results only by new thinking, without any historical knowledges or experiments.