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KTDU-417
Isayev Nitric acid/UDMH rocket engine. Luna 15-24 descent stage. Out of Production. Comprised turbopump-fed high-thrust engine with plus KTDU-417-B low-thrust engine. Eleven ignitions for lunar orbit insertion and orbit corrections.

AKA: 11D417;KRD-417. Status: Out of Production. Thrust: 18.92 kN (4,253 lbf). Unfuelled mass: 81 kg (178 lb). Specific impulse: 314 s. Burn time: 650 s. Height: 0.79 m (2.59 ft). Diameter: 0.73 m (2.39 ft).

Two different oxidizers named.

Chambers: 1 + 2. Throttled thrust(vac): 7.350 kN (1,652 lbf). Engine: 81 kg (178 lb). Chamber Pressure: 83.00 bar. Propellant Formulation: AK27I/UDMH. Thrust to Weight Ratio: 23.93. Oxidizer to Fuel Ratio: 1.8. Coefficient of Thrust vacuum: 0. Coefficient of Thrust sea level: 0.



Subtopics

KTDU-417-B Isayev N2O4/UDMH rocket engine. Luna 15-24 used this low thrust engine in system KTDU-417 for soft-landing on the moon. Out of Production. Pressure-fed engine; could be throttled to 2.06 kN.

Family: Storable liquid. Country: Russia. Spacecraft: Luna Ye-8, Luna Ye-8-5, Luna Ye-8-LS, Luna Ye-8-5M. Propellants: Nitric acid/UDMH. Agency: Isayev bureau. Bibliography: 225, 321, 329, 342, 344.

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