This page no longer updated from 31 October 2001. Latest version can be found at SR-71/M-12

Gross Mass: 66,122 kg. Empty Mass: 27,210 kg. Thrust (vac): 0 kgf. Isp: 2,084 sec. Burn time: 5,000 sec. Propellants: Air/Kerosene Isp(sl): 1,894 sec. Diameter: 5.6 m. Span: 15.9 m. Length: 29.6 m. Country: USA. No Engines: 2. J58 Status: Hardware. Comments: Lockheed Reconaissance-delta wing. Maximum release conditions: Piggy-back, 9,091 kg (12.1 m length x 5.2 m span) at 3,300 kph at 24,390 m (D-21).
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Last update 12 March 2001.
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© Mark Wade, 2001 .