GEM 60 Designer: Hercules. Gross Mass: 33,199 kg (73,191 lb). Empty Mass: 3,250 kg (7,160 lb). Propellants: Solid. Thrust(vac): 851.500 kN (191,425 lbf). Thrust(sl): 758.000 kN (170,405 lbf). Isp: 275 sec. Isp (sea level): 245 sec. Burn time: 90 sec. Diameter: 1.52 m (4.98 ft). Length: 16.20 m (53.10 ft). Chambers: 1. Chamber Pressure: 90.00 bar. Area Ratio: 11.00. Country: USA. Status: In production. First Flight: 2002. Last Flight: 2002. Flown: 2.00. GEM 60 used on Rocket Stages Used on stage: GEM 60. on launch vehicle: Delta IV Medium+ (4.2). Used on stage: GEM 60. on launch vehicle: Delta IV Medium+ (5.2). Used on stage: GEM 60. on launch vehicle: Delta IV Medium+ (5.4). Bibliography and Further Reading Isakowitz, Steven J, Hopkins, Joshua B, and Hopkins, Joseph P, International Reference to Space Launch Systems, AIAA, Washington DC, 2004. ISBN: 156347591X. The best reference on launch vehicles ever produced. More at amazon.com...                   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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