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.

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 designed to compete with Douglas DC-7C. The standard radome for the weather radar extends total length by 2 ft 7 in (0.78 m) over L-1049 without radome. New thin-section wing with a straight taper, and much larger fuel capacity giving a ferry range of over 6,880 mi (11,080 km), first flight 10 October 1956. 44, including the prototype, were built.


 * L-1649B
 * Planned turboprop version of the L-1649A.


 * L-051
 * Original company designation for the XB-30 project.


 * L-084
 * The XW2V-1 was a planned radar version of the WV-2 with the Starliner's wings for the US Navy. It would have included four Allison T56-A8 engines and missiles for protection against attackers. Considerably different from its predecessors, given the production designation Lockheed L-084.

Military designations

 * XB-30
 * Bomber version of the C-69. Was given model designation L-051 and later L-249.


 * XC-69
 * Designation for the prototype Constellation. One built. The C-69 was the original military transport version for the USAAF. All aircraft built during World War II were pressed into military service under this designation.


 * C-69
 * Original troop transport version. Almost all of this type were converted into L-049 airliners. 22 were built.


 * C-69A
 * Proposed long range troop version of the C-69.


 * C-69B
 * Proposed long range troop version of the C-69 designed to carry B-29 Superfortress engines to China. Was given model designation L-349.


 * C-69C-1
 * VIP transport aircraft, later designated ZC-69C-1. Only one aircraft was produced. Was given model designation L-549.


 * C-69D
 * Proposed VIP transport version.


 * XC-69E
 * Prototype XC-69 converted into an engine testbed. It was powered by 4 Pratt & Whitney R-2800 Double Wasp engines.


 * C-121A
 * The C-121 was the military transport version of improved L-749 introduced in 1948. Reinforced floor, cargo door in port rear fuselage


 * VC-121A
 * VIP transport aircraft, converted from the C-121A


 * VC-121B
 * VIP transport for use by the President of the United States of America


 * C-121C
 * R7V-1 with R-3350-34 engines with 3,400 hp (2,536 kW) each, based on L-1049


 * JC-121C
 * Two C-121C and one TC-121C used as avionics testbeds


 * NC-121C
 * One C-121C converted for permanent use as a testbed


 * RC-121C
 * USAF long-range airborne radar analogous to Navy's WV-2


 * TC-121C
 * Nine RC-121Cs Converted as AEW trainers, subsequently became EC-121C


 * VC-121C
 * VIP version of C-121C. Total 4.


 * EC-121D
 * Big Eye/College Eye/Disco early warning variant, originally designated RC-121D


 * NC-121D
 * WV-2 converted to observe high speed objects in the atmosphere nicknamed the "Tripple Nipple"


 * RC-121D
 * WV-2 with wingtip fuel tanks, later redesignated EC-121D


 * VC-121E
 * VIP transport for use by the President of the United States of America


 * YC-121F
 * Two prototype R7V-1 with Pratt & Whitney T34-P-6 turboprops with 6,000 shp (4,476 kW) each


 * C-121G
 * 32 Navy R7V-1 delivered to USAF


 * TC-121G
 * Designation given to 9 C-121G converted into trainers


 * VC-121G
 * One C-121G given the role as a temporary VIP Transport


 * EC-121H
 * 42 EC-121D with upgraded electronics


 * C-121J
 * Redesignated Navy R7V-1


 * EC-121J
 * 2 EC-121D with upgraded electronics


 * NC-121J
 * 7 C-121J modified to send television broadcasts to troops in Vietnam


 * VC-121J
 * 4 C-121J converted for VIP use. One served with the Blue Angels.


 * EC-121K
 * Redesignated Navy WV-2 Warning Star


 * JC-121K
 * One EC-121K used as an avionics testbed


 * NC-121K
 * EC-121K used by the Navy


 * EC-121L
 * Redesignated Navy WV-2E


 * EC-121M
 * Redesignated Navy WV-2Q


 * WQC-121N
 * Redesignated Navy WV-3


 * EC-121P
 * EC-121K equipped for anti-submarine warfare


 * EC-121Q
 * EC-121D with upgraded electronics


 * EC-121R "BatCat"
 * EC-121K and EC-121P equipped to process signals from seismic instruments


 * NC-121S
 * Electronic warfare and reconnaissance version


 * EC-121T
 * Upgraded radar; One example is on display at Peterson Air and Space Museum, EC-121T photo.


 * R7O-1
 * The original US Navy designation of the R7V-1 based on L-1049D, R-3350-91 engines with 3,250 hp (2,425 kW) each


 * R7V-1
 * Re-designation of the R7O-1. Later redesignated C-121J


 * R7V-1P
 * One R7V-1 modified for Arctic use


 * R7V-2
 * Four prototypes with Pratt & Whitney YT34-P-12A turboprops of 4,140 shp (3,088 kW) each. Two were delivered as YC-121F prototype aircraft (see above).


 * PO-1W
 * Two maritime patrol aircraft equipped with search radar based on L-749, later re-designated WV-1.


 * PO-2W Warning Star
 * Long-range airborne radar aircraft, R-3350-34 or R-3350-42 engines with 3,400 hp (2,536 kW) each, based on L-1049, later re-designated WV-2.


 * WV-1
 * Re-designation of the PO-1W.


 * WV-2 Warning Star
 * Re-designation of the PO-2W. Later re-designated EC-121K.


 * WV-2E
 * Experimental version of WV-2 modified to carry a rotating radar dome similar to that of the Boeing E-3 Sentry. Later redesignated EC-121L.


 * WV-2Q
 * WV-2 equipped for electronic warfare, later redesignated EC-121M.


 * WV-3
 * Eight aircraft equipped for weather reconnaissance. Later re-designated WQC-121N.


 * XW2V-1
 * The XW2V-1 was a planned radar version of the WV-2 with the Starliner's wings for the US Navy. It would have included four Allison T56-A8 engines and missiles for protection against attackers. Considerably different from its predecessors, given the production designation Lockheed L-084.