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Boeing 2707
The Boeing 2707 was the first American supersonic transport (SST) project. After winning a competition for a government-funded contract to build an American SST, Boeing began development at its facilities in Seattle, Washington. The design emerged as a very large aircraft with seating for 250 to 300 passengers and cruise speeds in the range of Mach 3. This made it much larger and significantly faster than competing designs like the Concorde, with more than twice the seating capacity.
The SST was the topic of considerable concern within and outside the aviation industry. From the start the airline industry had noted that the economics of the design were questionable, concerns that were only partially addressed during development. Outside the field, the entire SST concept was the subject of considerable negative press, centered on the issue of sonic booms and effects on the ozone layer.
A key design feature of the 2707 was its use of a swing wing planform. During development the required weight and size of this mechanism continued to grow, forcing the team to start over using a conventional delta wing. Rising costs and the lack of a clear market led to its cancellation in 1971 before two prototypes had been completed.
==Development==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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