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RB-211-22B
Rolls Royce turbofan engine. Thrust is maximum sea level thrust; specific impulse is sea level value at that thrust. Used on L1011 launch aircraft for Pegasus, Pegasus XL. First flight 1990.

Number: 117 . Thrust: 29.40 kN (6,609 lbf). Unfuelled mass: 4,180 kg (9,210 lb). Specific impulse: 9,900 s. Burn time: 4,590 s.

Thrust (sl): 26.700 kN (6,002 lbf). Thrust (sl): 2,727 kgf. Engine: 4,180 kg (9,210 lb). Thrust to Weight Ratio: .71.

Family: Turbofan. Country: UK. Launch Vehicles: Pegasus, Pegasus XL. Propellants: Air/Kerosene. Stages: L-1011. Agency: Rolls Royce.
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