Boeing 2707 prototype supersonic airliner designed to fly at Mach 3. Further development was halted after the U.S. government cut funding in 1971.
https://diqn32j8nouaz.cloudfront.net...7_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...1_fullsize.jpg
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Previously:
https://www.homemadetools.net/forum/...085#post210815
https://www.homemadetools.net/forum/...473#post151107
https://www.homemadetools.net/forum/...682#post206019
https://www.homemadetools.net/forum/...979#post144904
https://www.homemadetools.net/forum/...2981#post97744