A fluid flowing past the surface of a body exerts a force on it. Lift is the component of this force that is perpendicular to the oncoming flow direction. It contrasts with the drag force which is the component of the force parallel to the flow direction.
You may think lift thrust weight and drag are defined in a crazy way but the definitions aren&X2019t going to change anytime soon. They have too much history behind them and they actually have advantages when analyzing complex situations.Aerodynamics in flight flight principles applied to airplanes. Forces acting on the airplane. In some respects at least how well a pilot performs in flight depends upon the ability to plan and coordinate the use of the power and flight controls for changing the forces of thrust drag lift and weight.The BAE Hawk v1.1.1 01 sep 17 greg goebel The British were leaders in aircraft design through the Second World War but suffered a slow decline in their aerospace and defense capabilities after the war due to economic constraints and political indifference.
The Ilyushin Il-12 & Il-14 v1.0.1 01 nov 16 greg goebel During World War II the Soviet Union made extensive use of the Douglas DC-3 twin-piston airliner which was produced under license in the USSR as the Lisunov Li-2.Discussion pressure drag. The force on an object that resists its motion through a fluid is called drag.When the fluid is a gas like air it is called aerodynamic drag (or Lift-off. A rocket will launch and keep speeding up as long as the force pushing it upwards (thrust) is greater than the forces pulling and pushing it downwards (gravity and drag).