En aeronáutica, se llama alcance de una aeronave a la distancia que es capaz de recorrer volando a velocidad de crucero en línea recta. Este concepto es diferente del radio de acción, que implica que la aeronave debe volver a su punto de salida en el mismo vuelo. El alcance máximo es una especificación muy importante para las aeronaves y se calcula con el aparato repleto de combustible y con la carga de pago mínima. Cuanta más carga de pago lleve un avión y menos combustible, menor será su alcance.

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The maximal total range is the maximum distance an aircraft can fly between takeoff and landing, as limited by fuel capacity in powered aircraft, or cross-country speed and environmental conditions in unpowered aircraft. The range can be seen as the cross-country ground speed multiplied by the maximum time in the air. The fuel time limit for powered aircraft is fixed by the fuel load and rate of consumption. When all fuel is consumed, the engines stop and the aircraft will lose its propulsion. Ferry range means the maximum range the aircraft can fly. This usually means maximum fuel load, optionally with extra fuel tanks and minimum equipment. It refers to transport of aircraft for use on remote location without any passengers or cargo. Combat range is the maximum range the aircraft can fly when carrying ordnance. Combat radius is a related measure based on the maximum distance a warplane can travel from its base of operations, accomplish some objective, and return to its original airfield with minimal reserves.

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