R-42 R-42 Credit - Aerojet Redmond Designer: Aerojet Redmond. Propellants: N2O4/MMH. Thrust(vac): 890 N (200 lbf). Isp: 303 sec. Burn time: 3,940 sec. Mass Engine: 4.53 kg (9.98 lb). Diameter: 0.39 m (1.27 ft). Length: 0.79 m (2.59 ft). Chambers: 1. Chamber Pressure: 7.10 bar. Area Ratio: 160.00. Country: USA. Status: In Production.                   Contact us with any corrections, additions, or comments. Conditions for use of drawings, pictures, or other materials from this site.. To contact astronauts or cosmonauts. © Mark Wade, 1997 - 2007 except where otherwise noted.

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