Encyclopedia Astronautica
L-1011



l1011.jpg
L1011 Pegasus Launch
L1011 Pegasus Launcher
Subsonic rocket launch aircraft. Loaded/empty mass 156,000/109,629 kg. Thrust 561.90 kN. Specific impulse 9900 seconds. Lockheed airliner swept wing. Release conditions: Belly-mounted, 36,800 kg, 17.1 m length x 7.9 m span at 925 kph at 11,890 m altitude

Cost $ : 30.000 million. No Engines: 3. Release velocity: 240 m/s (780 ft/sec). Release altitude: 12 m (39 ft). Release conditions: 925 kph at 11.9 km.

Location: 240.
Status: Active.
Gross mass: 156,000 kg (343,000 lb).
Unfuelled mass: 109,629 kg (241,690 lb).
Payload: 36,800 kg (81,100 lb).
Height: 54.00 m (177.00 ft).
Diameter: 16.86 m (55.31 ft).
Span: 47.00 m (154.00 ft).
Thrust: 561.90 kN (126,320 lbf).
Specific impulse: 9,900 s.
Specific impulse sea level: 9,000 s.
Burn time: 4,590 s.
Number: 75 .

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Associated Countries
Associated Engines
  • RB-211-22B Rolls Royce turbofan engine. 29.4 kN. Thrust is maximum sea level thrust; specific impulse is sea level value at that thrust. Isp=9900s. Used on L1011 launch aircraft for Pegasus, Pegasus XL. First flight 1990. More...

Associated Launch Vehicles
  • Pegasus/HAPS American air-launched orbital launch vehicle. Five stage version consisting of 1 x NB-52 + 1 x Orion 50S + 1 x Orion 50 + 1 x Orion 38 + 1 x HAPS More...
  • Pegasus XL American air-launched orbital launch vehicle. Uprated version of Pegasus air-launched winged light satellite launcher. 4 stage vehicle consisting of 1 x L-1011 + 1 x Pegasus XL stage 1 + 1 x Orion 50XL + 1 x Orion 38. More...
  • Pegasus H American air-launched orbital launch vehicle. Four stage vehicle consisting of 1 x L-1011 + 1 x Orion 50S + 1 x Orion 50 + 1 x Orion 38 More...
  • Pegasus XL/HAPS American air-launched orbital launch vehicle. Five stage version consisting of 1 x L-1011 + 1 x Pegasus XL stage 1 + 1 x Orion 50XL + 1 x Orion 38 + 1 x HAPS More...

Associated Propellants
  • Air/Kerosene Ambient air (78 % nitrogen, 21% oxygen, etc.) is scooped up by air intakes and used in turbojet, turbofan, ramjet, scramjet, or other airbreathing engines. It is used to burn aviation-grade kerosene, commercial grade JP-4 or JP-5, their military equivalents, or special high-temperature blends such as those used in the SR-71. More...

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