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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In terms of design, the A400M has a classic high wing configuration, fuselage with ramp and large rear door, high flotation retractable landing gear and "T" tail.

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The design, a more radical triangular wing-body shape, combines the plane's fuselage with the wings and has no tail.

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If the supplier of a section of the fuselage, say, decides to move the location of a door by 2 inches, that will affect the design of everything around it, from the placement of windows to the location of hidden wiring bundles.

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