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Loren Booda
Loren Booda is offline
#11
Apr5-03, 01:12 AM
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P: 3,408
enigma, damgo-

My guess is that the answer lies in the Reynolds number. The increase in apparent sonic length of the aircraft from stem to stern, due to gradient diagonalization in the jet stream, is the same effect as diminished boom at an equivalent diagonal with no jet stream. The transition from boom with no jet stream to no boom with jet stream (neglecting changes in atmospheric density) would be given by

(vJ+vA)/vA=L/L(sin([the]))=1/(sin([the]))

Where vJ is the jet stream velocity, vA is the velocity of the aircraft, L the length of the aircraft, and [the] the angle from the ground to the plane.