Discussion
Consider the following statements about the sonic boom:
1. Its strength depends on the aircraft's length, weight and altitude.
2. It reaches the ground continuously along the flight track, not only at the moment of transition.
3. It can be eliminated entirely by careful shaping.
Which of the statements given above is or are correct?
Answer: B
The first two are correct. The third overstates what shaping can do: careful distribution of volume and lift along a long airframe can soften the signature substantially, which is what low-boom research pursues, but the pressure disturbance cannot be made to vanish while the aircraft is supersonic.
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