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 transatlantic flights, first flight 14 March 1947 L-749A Reinforced landing gear and fuselage L-749B Turbine powered. Project cancelled due to the absence of a suitable powerplant. L-849 Planned version of the L-749, which would have had Wright R-3350 TurboCompounds. L-949 Proposed Speedfreighter combi version of the L-849 with an 18 ft 4in fuselage stretch. L-1049 First production version, 24 built. An 18 ft 4 in (5.59 m) stretched version with a maximum capacity of 109 passengers, square windows; all 1049C and later models had Turbo-Compound engines. Some later models had optional tip tanks. First flight 14 July 1951. 579 built, including military versions. L-1049A Company designation for the WV-2, WV-3, EC-121D and RC-121D. L-1049B Company designation for the R7V-1, RC-121C and VC-121E. L-1049C Civil variant of the 1049B for 110 passengers with four R-3350-87ТС18DA-1 Turbo-compound engines with 3,250 hp (2,425 kW) each, 48 built L-1049D Freight version of L-1049B with wing and fuselage modifications and a large cargo door, four built L-1049E Passenger variant of the 1049D, 28 built L-1049F Company designation for the C-121C. L-1049G Advanced variant with four R-3350-972ТС18DA-3 engines with higher METO power, ability to carry wingtip fuel tanks, 102 built L-1049H Passenger/freight convertible version of L-1049G with large cargo door, 53 built L-1049J Planned L-1049G with the wings of the R7V-2. L-1149 A planned Allison turboprop version of the L-1049G and L-1049H. L-1249A Company designation for the R7V-2 and YC-121F. L-1249B Planned turboprop passenger version of the R7V-2/YC-121F. L-1349 unidentified. Dominique Breffort's book claims no design with the L-1349 designation ever existed, possibly due to superstitious belief reasons. L-1449 Proposed turboprop version of the L-1049G with a stretched fuselage and new wing. L-1549 Planned stretched version of the L-1449. L-1649A Starliner Production version, R-3350-988TC18EA-2 Turbo Cyclone engines with 3,400 hp (2,536 kW) each. Long-range passenger aircraft