Subsonic aircraft

Czech subsonic multi-role combat aircraft Aero L-159 Alca.

A Spitfire built in 1945 shows off its straight elliptical wing

A subsonic aircraft is an aircraft with a maximum speed less than the speed of sound (Mach 1). The term technically describes an aircraft that flies below its critical Mach number, typically around Mach 0.8. All current civil aircraft, including airliners, helicopters and airships, as well as many military types, are subsonic.

单词	Subsonic aircraft
释义	Subsonic aircraft 英语百科 Subsonic aircraft A subsonic aircraft is an aircraft with a maximum speed less than the speed of sound (Mach 1). The term technically describes an aircraft that flies below its critical Mach number, typically around Mach 0.8. All current civil aircraft, including airliners, helicopters and airships, as well as many military types, are subsonic.
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