Lockheed Constellation
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The Lockheed Constellation is a propeller-driven, four-engined airliner built by Lockheed Corporation starting in 1943. The Constellation series was the first pressurized-cabin civil airliner series to go into widespread use. Wikipedia
Developed from: L-044 Excalibur
Developed into: Lockheed XB-30 (Unbuilt)
First flight: January 9, 1943
Number built: 856
Produced: 1943–1958
Retired: 1990s, airline service; 1978, military