Gross Mass: 6,390 kg.
Empty Mass: 1,564 kg. Thrust (vac): 10,945 kgf. Isp: 250 sec. Burn time: 127 sec. Propellants: Lox/KeroseneIsp(sl): 217 sec. Diameter: 0.9 m. Span: 3.1 m. Length: 8.3 m. Country: Russia. No Engines: 1. S2.253 derivativeStatus: Design 1953. Comments: First stage for Eksperimentalnaya krilataya raketa (experimental winged rocket), Mach 3 ramjet. Boosted second stage to ramjet ignition conditions.