any of several converted commercial aircraft equipped with special communications and code gear, intended as flying bunkers for the president, secretary of defense, military commanders, or their designated replacements.
stopped up by air.
- Air brake
a brake or system of brakes operated by compressed air. Aeronautics. a device for reducing the air speed of an aircraft by increasing its drag. a device for stopping the sails of a windmill by disrupting the flow of air around them. Contemporary Examples Johnson Welded Products Ohio-based manufacturer of reservoirs for air brake systems. […]
(of an engine, aircraft, missile, etc.) to take in air from the atmosphere to oxidize the fuel for combustion.
an aircraft, missile, or submarine engine that requires air from the atmosphere for the combustion of its fuel.