To sustain an aircraft in flight, a pilot must understand how thrust, drag, lift, and weight act on the aircraft. By understanding the aerodynamics of flight—how design, weight, load factors, and gravity affect an aircraft during maneuvers from stalls to high-speed flight—the pilot learns to control the balance between these forces. For information on stall speeds, load factors, and other important aircraft data, always consult the AFM/POH for the specific aircraft being flown.