The cost of re-doing an aluminum fuselage design that is already complete, using another material set makes it pretty much prohibitive.

成本重新做一个铝合金机身设计已经完成，使用另一种物质设置使得它非常令人望而却步。

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MIT’s D “double bubble” series design concept is based on a modified “tube-and-wing” structure that has a very wide fuselage to provide extra lift.

麻省学院的D型“两个泡泡”系列设计概念基于改进过的“管状机身和一对后倾机翼”结构，机身更加宽大，可以提供额外的升力。

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The big challenge is figuring out how to design the air intakes to maximize airflow over the fuselage.

最大的挑战是如何设计进风口以使机身气流最大化。

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At the same time, Learjet was working on the Learjet 45, a totally new fuselage design, which would also target the light jet buyer seeking more range and cabin size together with operating costs less than a typical midsize aircraft.

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By altering the design of the fuselage and wings of an aircraft, one can alter how the sonic boom is created and shaped.

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It had a stout airframe with a fail-safe design, flat floor and squared oval fuselage, which gave it an exceptionally spacious cabin.

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