the planes don't need air pressure, the humans inside need oxygen to breath and the air gets thinner the higher you go
In a commercial airliner flying at cruising altitude, the air pressure inside the airplane is considerably higher than the air pressure outside. The air pressure outside is too low for people to breathe comfortably, so the interior is pressurized.
There is low air pressure usually when you are up in a mountain or in an airplane like when your ears pop after you get in an airplane and you are at high altitude your ears do this because the pressure inside your ears and the pressure in the air is not the same. When there low air pressure the air is less dense.
Aircraft windows need to resist severe air pressure changes and pressure differential.
Atmospheric pressure is caused by the weight of air above the measurement point. At 30,000 feet in the sky, the air pressure on the outside of the airplane will be much lower than it was nearer the ground.
it is air pressure
It increases. In an unpressurized airplane, the pressure increases because the air is denser at lower altitudes. In a pressurized airplane, the pressure increases both because the pressure must be equalized before the doors can open and because the hull is not designed to withstand an outside pressure higher than the inside pressure.
From Bernoulli's theorem this results in the air above the wing to form a low pressure compared to the air beneath the wing. High pressure moves to low pressure so you get lift
The air above an airplane wing in flight is at lower pressure than the air below the wing. Hope this helps.
Gravity , wind and air pressure.
The air under the plane's wings exerts pressure.
Air pressure.
You can't fly in a vacuum! Air pressure is what keeps an airplane or a bird in flight.