Encyclopedia Astronautica
USRM


Hercules solid rocket engine. 7560.5 kN. Isp=286s.Strap-on booster for Titan 4B. First flight 1997.

Thrust (sl): 6,846.800 kN (1,539,222 lbf). Thrust (sl): 698,191 kgf. Propellant Formulation: HTPB.

Gross mass: 357,239 kg (787,577 lb).
Unfuelled mass: 52,040 kg (114,720 lb).
Height: 33.54 m (110.03 ft).
Diameter: 3.20 m (10.40 ft).
Thrust: 7,560.50 kN (1,699,668 lbf).
Specific impulse: 286 s.
Specific impulse sea level: 259 s.
Burn time: 140 s.
Number: 34 .

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Associated Countries
See also
Associated Launch Vehicles
  • Titan 4B American orbital launch vehicle. Titan 4 with Upgraded Solid Rocket Motors replacing UA1207. Developed to improve performance for certain missions, and reduce number of field joints in motor after Challenger and Titan 34D explosions involving segmented motors. More...
  • Nerva 2 American nuclear-powered orbital launch vehicle. Version of 1960's nuclear fission engine proposed in 1990's. More...
  • Timberwind American nuclear-powered orbital launch vehicle. DARPA project. Nuclear fission engine using pebble bed reactor with spherical fuel elements. More...

Associated Manufacturers and Agencies
  • Hercules American manufacturer of rocket engines and rockets. Hercules, Wilmington, Delaware, USA. More...

Associated Propellants
  • Solid Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. More...

Associated Stages
  • Titan USRM Solid propellant rocket stage. Loaded/empty mass 357,239/52,040 kg. Thrust 7,560.68 kN. Vacuum specific impulse 286 seconds. More...

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