Encyclopedia Astronautica
HP-1


Notional lox/lh2 rocket engine. 6536 kN. Study 1963. Operational date would have been December 1974. Isp=451s. Used in Martin Nova studies MM 24G, MM 33.

Status: Study 1963.
Thrust: 6,536.00 kN (1,469,351 lbf).
Specific impulse: 451 s.
Specific impulse sea level: 379 s.
Burn time: 386 s.

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Associated Countries
See also
Associated Launch Vehicles
  • Nova MM 33 American heavy-lift orbital launch vehicle. Nova single stage to orbit design with 24 new high pressure LH2/Lox engines in the first stage in a plug nozzle arrangement. Operational date would have been April 1975. More...
  • Nova MM 24G American heavy-lift orbital launch vehicle. Nova design using new high pressure LH2/Lox engines; 18 in the first stage in a plug nozzle arrangement, 2 in the second. Operational date would have been December 1974. More...

Associated Propellants
  • Lox/LH2 Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. Liquid hydrogen was identified by all the leading rocket visionaries as the theoretically ideal rocket fuel. It had big drawbacks, however - it was highly cryogenic, and it had a very low density, making for large tanks. The United States mastered hydrogen technology for the highly classified Lockheed CL-400 Suntan reconnaissance aircraft in the mid-1950's. The technology was transferred to the Centaur rocket stage program, and by the mid-1960's the United States was flying the Centaur and Saturn upper stages using the fuel. It was adopted for the core of the space shuttle, and Centaur stages still fly today. More...

Associated Stages
  • Nova MM 24G-2 Lox/LH2 propellant rocket stage. Loaded/empty mass 1,043,000/136,000 kg. Thrust 10,228.00 kN. Vacuum specific impulse 451 seconds. Operational date would have been December 1974. More...
  • Nova MM 33-1 Lox/LH2 propellant rocket stage. Loaded/empty mass 10,489,000/626,000 kg. Thrust 156,876.00 kN. Vacuum specific impulse 443 seconds. Operational date would have been April 1975. SSTO - payload 1,042,000 lbs. More...
  • Nova MM-1 Lox/LH2 propellant rocket stage. Loaded/empty mass 5,040,000/317,000 kg. Thrust 95,261.00 kN. Vacuum specific impulse 451 seconds. Operational date would have been December 1974. More...

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