climb

In aviation, the term climb refers both to the actual operation of increasing the altitude of an aircraft and to the logical phase of a typical flight (often called the climb phase or climbout) following takeoff and preceding the cruise, during which an increase in altitude to a predetermined level is effected.
A climb is carried out by increasing the lift of airfoils (wings) supporting the aircraft until their lifting force exceeds the weight of the aircraft. Once this occurs, the aircraft will climb to a higher altitude until the lifting force and weight are again in balance. The increase in lift may be accomplished by increasing the angle of attack of the wings, by increasing the thrust of the engines to increase speed (thereby increasing lift), by increasing the surface area or shape of the wing to produce greater lift, or by some combination of these techniques. In most cases, engine thrust and angle of attack are simultaneously increased to produce a climb.
Because lift…