Re:United Airlines will buy 15 planes from Boom Supersonic
by theptip on Thursday June 03, 2021 @11:18AM
(#27382611)
Can’t you do coast-to-coast? I thought the requirement is no sonic boom over land, but you can fly out over the ocean and then turn around at Mach N. Eg SF<>NYC would be an obvious route that is worth adding some miles at the start, if you can go 3-4x quicker.
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Re:United Airlines will buy 15 planes from Boom Supersonic
by dharmab on Thursday June 03, 2021 @12:14PM
(#27383527)
A sonic boom is a continuous noise, not just at the transition. You perceive it as a single noise at the ground, but so does every other person along the entire flight path.
Boom's aircraft uses a modern design that reduces the loudness of the sonic boom.
Re:United Airlines will buy 15 planes from Boom Supersonic
by theptip on Thursday June 03, 2021 @01:05PM
(#27384232)
Thanks for the correction, I did have that incorrect. TIL.
Interesting follow-up -- from https://en.wikipedia.org/wiki/Sonic_boom, the angle of the shockwave cone decreases (i.e. gets narrower) as the plane's velocity goes up. I'm wondering at what Mach number would the cone be tight enough that it doesn't intersect land?
Re:United Airlines will buy 15 planes from Boom Supersonic
by mpweiher on Thursday June 03, 2021 @11:29AM
(#27382815)
The boom happens whenever you're flying supersonic, not just when you transition from < Mach 1 to > Mach 1.
Re:United Airlines will buy 15 planes from Boom Supersonic
by lvspiff on Thursday June 03, 2021 @11:36AM
(#27382941)
I hope everyone is given flight suits as just the image of a plane full of people making a 180 degree turn at 600mph to accelerate to 740mph is somewhat comical. I know not entirely what you are suggesting but its immediately the thought that came to mind.
Re:United Airlines will buy 15 planes from Boom Supersonic
by NegativeLatency on Thursday June 03, 2021 @11:38AM
(#27382966)
The plane might not be efficient at subsonic or transonic speeds.