Karman line (lift force)
Karman line, lies at an altitude of 100 kilometers (62 mi) above the Earth’s sea level, and commonly represents the boundary between the Earth’s atmosphere and outer space.An aircraft only stays in the sky if it constantly travels forward relative to the air (airspeed is not dependent on speed relative to ground), so that the wings can generate lift. The thinner the air, the faster the plane must go to generate enough lift to stay up.
If the lift coefficient for a wing at a specified angle of attack is known then the lift produced for specific flow conditions can be calculated by air density, the speed relative to the air and the wing area.
|L||Lift force (N)|
|ρ||Air density (kg/m3)|
|v||Speed relative to the air (m/s)|
|A||Wing area (m2)|
|CL||Lift coefficient (at the desired angle of attack, Mach number, and Reynolds number) (dimensionless)|