List of Lockheed Constellation variants
The Lockheed Constellation was an American civil airliner and military transport built in the 1940s and 1950s; this is a list of its variants. Commercial transport Civilian / Company designations L-049 The L-049 was the original commercial airliner produced, although some earlier L-049s were begun as military transports and completed as airliners. L-649 aircraft followed, with more powerful engines, but all were soon upgraded to L-749 standard with long-range fuel tanks. 88 L-049, 14 L-649, and 131 L-749 were built, including conversions from earlier models and military versions. First 22 aircraft delivered as C-69 transports, first flight 9 January 1943 L-149 L-049 conversion to include extra wing fuel tanks for a longer range. Production versions were planned for Pan Am, but none were ever produced. L-249 Company designation for the XB-30 bomber. Project cancelled in favor of the Boeing B-29. L-349 Company designation for the C-69B. None built. L-449 Unknown proposed civilian airliner version. L-549 Company designation for the C-69C. One built. L-649 R-3350-749C18BD engines with 2,500 hp (1,865 kW) each, seating for up to 81, first flight 19 October 1946 L-649A Reinforced landing gear and fuselage L-749 6,145 US gal (23,640 L) of fuel providing the capability for non-stop