page_title: Lockheed L-1249 Super Constellation
section_title: Specifications (YC-121F)
hierarchical_section_title: Lockheed L-1249 Super Constellation / Specifications (YC-121F)
caption_attribution_description: Line drawings for the U.S. Navy Lockheed R7V-2 Super Constellation (Lockheed Model L-1249). The R7V-2 was powered by four Pratt &amp; Whitney YT34-P-12A turboprops. Two aircraft were acquired by the Navy (BuNos 131630, 131631), and another two were ordered by the Navy for the U.S. Air Force (YC-121F, BuNos 131660, 131661).
context_page_description: The Lockheed L-1249 Super Constellation was a turbine-powered version of the Lockheed Constellation aircraft family. Built in 1954 and 1955, the aircraft were used as prototypes for possible future turboprop military transport aircraft for both the United States Air Force and United States Navy. Both aircraft saw very short lives and the airframes were later used to build L-1049 Super Constellations.
context_section_description: Data from Lockheed Constellation: from Excalibur to Starliner Civilian and Military Variants, YC-121F Charactaristics Summary
  General characteristics
  Crew: 4-15
  Capacity: 87-106 Passengers (Passenger configuration) / 73 Stretcher Cases (Medical configuration) / 24,210 lb (10,981 kg) payload
  Length: 116 ft 2 in (35.41 m)
  Wingspan: 117 ft 7 in (35.84 m) without tip-tanks
  119 ft (36 m) with tip-tanks
  Height: 25 ft 6 in (7.77 m)
  Wing area: 1,615 sq ft (150.0 m²)
  Airfoil: root: NACA 23018; tip: NACA 4412
  Empty weight: 50,999 lb (23,133 kg)
  Max takeoff weight: 136,000 lb (61,689 kg)
  Powerplant: 4 × Pratt & Whitney T34-P-6 turboprop engines, 5,531 shp (4,124 kW)  each
  Propellers: 3-bladed Hamilton Standard Hydromatic, 15 ft 0 in (4.57 m) diameter constant-speed feathering propellers
  Performance
  Maximum speed: 479 mph (771 km/h, 416 kn)
  Cruise speed: 430 mph (690 km/h, 370 kn)
  Stall speed: 117 mph (188 km/h, 102 kn)
  Combat range: 1,150 mi (1,850 km, 1,000 nmi) at 24,210 lb (10,981 kg) payload
  Service ceiling: 26,400 ft (8,000 m) at MTOW
  32,900 ft (10,028 m) at combat weight with maximum power
  Rate of climb: 2,310 ft/min (11.7 m/s) at MTOW
  4,600 ft/min (23.37 m/s) at combat weight with maximum power
caption: L-1249A Super Constellation
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