NASA Langley/Lockheed 1990 Mach 2.0 & AST3I Mach 3.0 transports

flateric

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NASA Langley/Lockheed 1990 Mach 2.0 & AST3I Mach 3.0 transports
 

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Those concepts from 1990 are about the size of the Boeing 2707 and Lockheed L-2000 designs, being over 300 feet long. And one of the proposals was intended to fly at Mach 2 despite being as big as the American SST designs. Does anyone have more info about Lockheed designs for a new-generation SST?
 
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