Hey Guys

I’ve always wondered why gravity does not pull down an airplane, but will
pull down most other things.

The science of flight is a fascinating subject!

The Four Forces Acting On An Airplane:

Lift - The energy of air on the top and bottom of the wing create LIFT which
keeps the plane in the air.
Thrust - The pulling power of the propeller and the strength of the engine
create THRUST which pulls the plane forward.
Gravity - The earth's GRAVITY acts to try to pull the airplane down to the
earth's surface
Drag - Friction between the plane's body and surrounding air creates the DRAG
which holds the plane back .

In a little more detail:

There will be less DRAG on a plane with a streamlined design - the air will
flow over the curved surfaces rather than impeding it.

GRAVITY will have less effect on a plane built from the lightest materials
available.

A properly designed propeller in combination with a properly placed engine
will provide the THRUST necessary to pull the plane forward.

Lift - A wing is constructed using a design called an airfoil. This wing
design, when pulled through the air by the airplanes motor and propeller,
causes LIFT. This force lifts the plane off the runway and into the air.

This LIFT occurs because the wings design causes air to flow faster over the
top of the wing than it does under the wing. The air pressure is lower on
top of the wing than it is below the wing. The High Pressure air under the
wing lifts the plane into the air utilizing Bernoulli's Principal.

With all the forces combined the airplane can fly in air, amazing, isn't it?

Hope you learnt something

CIA later
Love Sim :)