Encyclopedia Astronautica
S5.44


Isayev Nitric acid/Amine rocket engine. 177 kN. SAM-missile 5Ya24. Out of Production. Could be throttled. 177-49 kN sea-level. Area ratio 118 - 44.

Application: SAM-missile 5Ya24.

Throttled thrust(vac): 49.000 kN (11,015 lbf). Engine: 124 kg (273 lb). Area Ratio: 118. Propellant Formulation: AK27I/TG-02. Thrust to Weight Ratio: 145.16.

AKA: S5.44; 5D25.
Status: Out of Production.
Unfuelled mass: 124 kg (273 lb).
Height: 1.71 m (5.62 ft).
Diameter: 0.54 m (1.77 ft).
Thrust: 177.00 kN (39,791 lbf).
Specific impulse: 251 s.
Specific impulse sea level: 251 s.
First Launch: 1964-65.

More... - Chronology...


Associated Countries
See also
Associated Launch Vehicles
  • S-25 Russian surface-to-air missile. First surface-to-air missile deployed by the Soviet Union. Under a crash program ordered by Stalin, development began in 1951, first guided launch was in 1953, and by 1956, 2,640 launchers were deployed in defence of Moscow. The system was upgraded with improved missiles and ground systems into the 1960's. 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...

Bibliography
  • Glushko, V P, Albom Konstruktsiy ZhRD, Vol. 1 1968, Vol. 3 & 4 1969 via Dietrich Haeseler.
  • Russian Arms Catalogue, Vol 5 and 6, Military Parade, Moscow via Dietrich Haeseler.

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