The Lockheed design USES an inverted parabolic shape over a V-shaped engine array.
洛克希德采用了一种在V型引擎阵列上安置倒抛物线状尾翼的设计。
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The team used simulation tools to show it was possible to achieve over-land flight by dramatically lowering the level of sonic booms through the use of an "inverted-V" engine-under wing configuration.