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R-3A

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R-3A Conjectural Conjectural drawing of the R-3A. The actual configuration has never been released, but it seems to have been a conical body as recommended by Groettrup equipped with an R-2 engine. This configuration would lead directly to the R-7 ICBM and N1 super booster

AKA: 8A63;AA-2;Atoll;K-13. Status: Cancelled 1951. Payload: 500 kg (1,100 lb). Thrust: 400.00 kN (89,920 lbf). Gross mass: 23,400 kg (51,500 lb).

The R-3 itself was cancelled when difficulties were encountered in engine development and the decision was made to proceed directly to the R-7 ICBM. During its development the range of the R-3A had settled on 935 km with only a 500 kg payload. It was cancelled in October 1951 without ever flying, with the technology being applied to the R-5 and R-11 missiles. The Russians have been very reluctant to reveal the configuration of the R-3A. It seems likely that it was actually a subscale version of Groettrup's G-4 design, and formed the technical basis for both the R-7 ICBM and N1 super launch vehicle.

Maximum range: 900 km (550 mi).

Stage Data - R-3A

• Stage 1. 1 x R-3A. Gross Mass: 19,900 kg (43,800 lb). Empty Mass: 3,500 kg (7,700 lb). Thrust (vac): 434.400 kN (97,657 lbf). Isp: 235 sec. Burn time: 83 sec. Isp(sl): 210 sec. Diameter: 1.65 m (5.42 ft). Span: 3.50 m (11.40 ft). Length: 20.00 m (65.00 ft). Propellants: Lox/Alcohol. No Engines: 1. Engine: RD-102. Status: Development 1951. Comments: Further incremental upgrade of R-2. Payload 500 kg. Range 935 km. Developed from 1949 to October 1951. Cancelled, work combined with 8K14 development.