This page no longer updated from 31 October 2001. Latest version can be found at J57-19

Designer: Pratt and Whitney. Used on stages: NB-52. Used on launch vehicles: X-15A, X-15A-2. Propellants: Air/Kerosene Thrust(vac): 5,487 kgf. Thrust(vac): 53.80 kN. Isp: 5,142 sec. Burn time: 48,000 sec. Chambers: 1. Country: USA. Status: Out of Production. Comments: Thrust is maximum sea level thrust; specific impulse is sea level value at that thrust.
Back to Index
Last update 12 March 2001.
Definitions of Technical Terms.
Contact Mark Wade with any corrections or comments.
Conditions for use of drawings, pictures, or other materials from this site..
© Mark Wade, 2001 .