Aerial refueling

Procedure in which flying aircraft receive fuel from another aircraft A KC-135 Stratotanker refuels an F-16 Fighting Falcon using a flying boom Chinese Chengdu J-20, Shenyang J-16, and Xian YY-20 in an aerial refueling formation Aerial refueling, also referred to as air refueling, in-flight refueling (IFR), air-to-air refueling (AAR), and tanking, is the process of transferring aviation fuel from one aircraft (the tanker) to another (the receiver) while both aircraft are in flight. The two main refueling systems are probe-and-drogue, which is simpler to adapt to existing aircraft, and the flying boom, which offers faster fuel transfer but requires a dedicated boom operator station. The procedure allows the receiving aircraft to remain airborne longer, extending its range or loiter time. A series of aerial refuelings can give range limited only by crew's physiological needs (like fatigue) and engineering factors such as engine oil consumption. Because the receiver aircraft is topped-off with extra fuel in the air, aerial refueling can allow a takeoff with a greater payload which could be weapons, cargo, or personnel: the maximum takeoff weight is maintained by carrying less fuel and