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Engine Model: RD-221. Manufacturer Name: RD-221. Designer: Glushko. Developed in: 1960-. Application: missile stage 2 (stage 1 used RD-220). Propellants: Nitric acid/UDMH. Thrust(vac): 1,118.000 kN (251,336 lbf). Isp: 318 sec. Mass Engine: 1,070 kg (2,350 lb). Diameter: 2.40 m (7.80 ft). Length: 4.20 m (13.70 ft). Chambers: 1. Chamber Pressure: 147.00 bar. Area Ratio: 119.80. Oxidizer to Fuel Ratio: 2.80. Thrust to Weight Ratio: 106.54. Country: Russia. Status: Developed 1960-.
Bibliography:- Glushko, V P, Albom Konstruktsiy ZhRD, Vol. 1 1968, Vol. 3 & 4 1969 via Dietrich Haeseler.
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