NB-52 rocketplane launcher with X-15
Subsonic rocket launch aircraft. Loaded/empty mass 177,273/70,545 kg. Thrust 430.47 kN. Specific impulse 5142 seconds. Boeing Bomber-swept wing. Maximum release conditions: Wing mounted, 25,000 kg (19.1 m length x 6.7 m span) at 880 kph at 11,448 m altitude
Cost $ : 50.000 million. No Engines: 8. Release conditions: 880 kph at 11.5 km.
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Gross mass: 177,273 kg (390,820 lb).
Unfuelled mass: 70,545 kg (155,525 lb).
Payload: 25,000 kg (55,000 lb).
Height: 47.74 m (156.62 ft).
Diameter: 14.72 m (48.29 ft).
Span: 56.40 m (185.00 ft).
Thrust: 430.47 kN (96,774 lbf).
Specific impulse: 5,142 s.
Specific impulse sea level: 4,675 s.
Burn time: 48,000 s.
Number: 14 .
J57-19 Pratt and Whitney turbojet engine. 53.8 kN. Out of production. Thrust is maximum sea level thrust; specific impulse is sea level value at that thrust. Isp=5142s. Used on B-52 launch aircraft for X-15A. First flight 1959. More...
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