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The 2707-300 if build would have been an enormous aircraft. Packing 250 passengers into a narrow, supersonic fuselage meant the only growth dimension was length. Forget width or height, A380 or 747. End result: 300 feet long / 91 meters. Longer than the defunct An-225 ! And dwarfing such "giants " as Concorde or the XB-70 (200 feet long).It would have weighed up to 700 000 pounds, and to accelerate such behemoth to Mach 2.7, the GE4s would have provided 30 tons thrust each. Growth variants up to 35 tons were being planned at the time of cancellation. The GE4 was a scaled-up, improved J93: already a massive turbojet, six of them needed to power a 550 000 pound XB-70 to Mach 3.1.And the whole thing would have to be build out of titanium. As if Lockheed didn't had serious troubles to build a 100 ft long, Mach 3 titanium plane called the SR-71. Technology transfers were happening between Lockheed and Boeing. The Soviet Union was also involved, as their raw titanium was better than the US. There was even an informative meeting in Paris between Boeing officials and Soviet aerospace engineers.
The 2707-300 if build would have been an enormous aircraft. Packing 250 passengers into a narrow, supersonic fuselage meant the only growth dimension was length. Forget width or height, A380 or 747. End result: 300 feet long / 91 meters. Longer than the defunct An-225 ! And dwarfing such "giants " as Concorde or the XB-70 (200 feet long).
It would have weighed up to 700 000 pounds, and to accelerate such behemoth to Mach 2.7, the GE4s would have provided 30 tons thrust each. Growth variants up to 35 tons were being planned at the time of cancellation. The GE4 was a scaled-up, improved J93: already a massive turbojet, six of them needed to power a 550 000 pound XB-70 to Mach 3.1.
And the whole thing would have to be build out of titanium. As if Lockheed didn't had serious troubles to build a 100 ft long, Mach 3 titanium plane called the SR-71. Technology transfers were happening between Lockheed and Boeing. The Soviet Union was also involved, as their raw titanium was better than the US. There was even an informative meeting in Paris between Boeing officials and Soviet aerospace engineers.
