Encyclopedia Astronautica
Nerva 2


American nuclear-powered orbital launch vehicle. Version of 1960's nuclear fission engine proposed in 1990's.

Flyaway Unit Cost $: 266.660 million.

Stage Data - Nerva 2

  • Stage 0. 2 x Titan USRM. Gross Mass: 357,239 kg (787,577 lb). Empty Mass: 52,040 kg (114,720 lb). Thrust (vac): 7,560.681 kN (1,699,709 lbf). Isp: 286 sec. Burn time: 140 sec. Isp(sl): 259 sec. Diameter: 3.20 m (10.40 ft). Span: 3.20 m (10.40 ft). Length: 33.54 m (110.03 ft). Propellants: Solid. No Engines: 1. Engine: USRM. Other designations: Upgraded Solid Rocket Motor. Status: In production.
  • Stage 1. 1 x Nerva 2/NTR. Gross Mass: 158,400 kg (349,200 lb). Empty Mass: 27,000 kg (59,000 lb). Thrust (vac): 333.000 kN (74,861 lbf). Isp: 925 sec. Burn time: 3,575 sec. Isp(sl): 0.0000 sec. Diameter: 10.00 m (32.00 ft). Span: 10.00 m (32.00 ft). Length: 47.60 m (156.10 ft). Propellants: Nuclear/LH2. No Engines: 1. Engine: Nerva NTR. Status: Study 1991.

Status: Study 1991.
Gross mass: 872,878 kg (1,924,366 lb).
Height: 57.00 m (187.00 ft).
Diameter: 10.00 m (32.00 ft).
Thrust: 13,693.80 kN (3,078,489 lbf).

More... - Chronology...


Associated Countries
Associated Engines
  • Nerva NTR DoE nuclear/lh2 rocket engine. 333.4 kN. Study 1991. Late 1980's update of 1960's Nerva design. Isp=925s. More...
  • USRM Hercules solid rocket engine. 7560.5 kN. Isp=286s.Strap-on booster for Titan 4B. First flight 1997. More...

See also
Associated Manufacturers and Agencies
  • NASA American agency overseeing development of rockets and spacecraft. National Aeronautics and Space Administration, USA, USA. More...

Associated Stages
  • Nerva 2/NTR Nuclear/LH2 propellant rocket stage. Loaded/empty mass 158,400/27,000 kg. Thrust 333.00 kN. Vacuum specific impulse 925 seconds. Design as revised in detail in 2005. More...
  • 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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