Encyclopedia Astronautica
Stepanov IS/US 16 kgf


Stepanov N2O4/UDMH rocket engine. 0.157 kN. IS/US. Out of Production.

Application: IS/US.

Status: Out of Production.
Thrust: 157 N (35 lbf).
First Launch: 1960-63.

More... - Chronology...


Associated Countries
Associated Spacecraft
  • US-A Russian military naval surveillance radar satellite. 38 launches, 1965.12.28 (Cosmos 102) to 1988.03.14 (Cosmos 1932). The US-A (later known as RLS) was a nuclear powered RORSAT (Radar Ocean Reconnaissance Satellite). More...
  • IS-A Russian military anti-satellite system. 22 launches, 1967.10.27 (Cosmos 185) to 1982.06.18 (Cosmos 1379). First operational ASAT. Tested in 1967-1971 and deployed through the late 1970's. Design as revised by Yangel and Korolev from Chelomei's original. More...
  • US-P Russian military naval signals reconnaisance satellite. 37 launches, 1974.12.24 (Cosmos 699) to 1991.01.18 (Cosmos 2122). The US-P (later known as RTR) was a solar powered EORSAT (Electronic Ocean Reconnaissance Satellite). More...

See also
Associated Manufacturers and Agencies
  • Stepanov Russian manufacturer of rocket engines. Stepanov Design Bureau, Russia. More...

Associated Propellants
  • N2O4/UDMH Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Unsymmetrical Dimethylhydrazine ((CH3)2NNH2) became the storable liquid fuel of choice by the mid-1950's. Development of UDMH in the Soviet Union began in 1949. It is used in virtually all storable liquid rocket engines except for some orbital manoeuvring engines in the United States, where MMH has been preferred due to a slightly higher density and performance. More...

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