2 ms·

First confirmation I've found so far on this exact question: "XB-1 is supersonic! (No boom audible here, as expected)" - Jon Ostrower https://bsky.app/profile/j

by hugs 2y ago

First confirmation I've found so far on this exact question: "XB-1 is supersonic! (No boom audible here, as expected)" - Jon Ostrower https://bsky.app/profile/jonostrower.com/post/3lgsvea6zbs2x https://bsky.app/profile/jonostrower.com/post/3lgsvea6zbs2x Raises more questions though, because there were two other chase planes. Did the other planes stay below the sound barrier at all times? Edit to add: Was no audible boom expected because of the planes themselves or because of where the people were watching from?

nine_k 2y ago
With planes being long enough away from the demonstrator, and speed of sound relatively low (about 330 m/s), the booms of all three planes should be separate enough, e.g. a good 100 ms away from one another, even if all three went supersonic and were dragging their respective shock waves. The distance between the planes appeared to be around 30-50 m at the supersonic transition time, as much as I can estimate the size of the planes. A sound recording made under the flight path should allow to measure how many dB was the demonstrator's boom.