Encyclopedia Astronautica

Isayev Nitric acid/Amine rocket engine. R-101 SAM. Developed 1949-50. Launch thrust 78.4 kN. Four chamber engine designed for use in the R-101 (derivative of German Wasserfall). Abandoned by 1950 in favour of single-chamber engine.

Application: R-101 SAM.

Chambers: 4. Thrust (sl): 78.400 kN (17,625 lbf). Thrust (sl): 8,000 kgf. Propellant Formulation: AK20K/TG-02.

Status: Developed 1949-50.
Thrust: 78.40 kN (17,625 lbf).
First Launch: May 1949.

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Associated Countries
See also
Associated Launch Vehicles
  • R-101 Post-war Russian version of German Wasserfall surface-to-air missile. Never put into production, but technology used for further surface-to-air and surface-to-surface missile developments in Russia. More...

Associated Manufacturers and Agencies
Associated Propellants
  • Nitric acid/Amine Drawing on the German World War II Wasserfall rocket, nitric acid (HNO3) became the early storable oxidiser of choice for missiles and upper stages of the 1950's. To overcome various problems with its use, it was necessary to combine the nitric acid with N2O4 and passivation compounds. These formulae were considered extremely secret at the time. By the late 1950's it was apparent that N2O4 by itself was a better oxidiser. Therefore nitric acid was almost entirely replaced by pure N2O4 in storable liquid fuel rocket engines developed after 1960. Early storable rocket systems sought to improve ignition characteristics and perforamance by eliminating the kerosene portion of the fuel. An amine is an organic compound produced when one or more hydrogen atoms of ammonia is replaced with organic groups. Mixed amine fuels were first developed by the Germans in World War II. TONKA-250, developed for the Wasserfall rocket, was used by the Russians after the war in various engines under the specification TG-02. More...

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