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Supersonic is unusable over land anyway. This aircraft is designed for trans-oceanic routes, like US to Asia or Europe. Quite hard to build a railway over the
by Gare 3y ago
Supersonic is unusable over land anyway. This aircraft is designed for trans-oceanic routes, like US to Asia or Europe.
Quite hard to build a railway over the ocean.
- sandworm101 3y ago>> Supersonic is unusable over land anyway. A myth created because Concord came to market before the American SST. Sonic booms are not the epic thunder crashes of Hollywood fame. The Concorde going by at altitude wouldn't be any louder than a truck engine braking on a nearby highway for a second or two.
- doctoboggan 3y agoMany municipalities have laws against engine breaking because of how much noise pollution it causes, so I don't think your example works they way you expect. Especially considering this would cause that noise pollution for 10s of millions of people.
- mrguyorama 3y agoNot even remotely correct. They flew supersonic aircraft over Oklhahoma City a thousand times and basically drove the city insane and had to cut testing short when it was obviously untenable to regularly Sonic Boom half a million people for commercial aviation, let alone every large city in America. https://en.wikipedia.org/wiki/Oklahoma_City_sonic_boom_tests https://en.wikipedia.org/wiki/Oklahoma_City_sonic_boom_tests If I'm doing my calculations correct, their targeted sound pressure levels of 50-100 pascal is equivalent to 127-133 decibels, which is over the threshold of discomfort for most, and getting close to the threshold of pain.
- coolspot 3y ago> their targeted sound pressure levels of 50-100 pascal is equivalent to 127-133 decibels At what distance from the plane?
- hermitdev 3y agoMy childhood home was in the flight path for NASA when they were given the Blackbird after it's official retirement. We also routinely had fire-retardant bombers flying eye level close enough you could read the tail numbers off with a naked eye (we were on the side of a mountain, bombers flew down the valley). Point is: the Blackbird, flying at altitude, sounded like a tree fell on the house . Big crash/thud suddenly. The bombers, though loud, were a steady build up until they passed, then quietly faded away. The Blackbird, I literally remember leaving the house to make sure there wasn't a hole in the wall or roof.
- sandworm101 3y agoBlackbird was a beast, literally the fastest plane out there and it never really slowed down. Compare shuttle, which came in much faster but few ever complained about its boom.
- Gare 3y agoThis seems bit excessive, Concorde booms were purportedly about 105-110 dB on the ground when cruising at altitude (around 60 000 ft). I've personally only experienced sonic booms from MiG-21s. They are not painfully loud, but surely startling. They are very deep and make the windows rattle.
- dreamcompiler 3y agoIt's no myth. I'm old enough to remember sonic booms as a regular occurrence. We were used to them but they were definitely louder than a jake brake and they disturbed a much larger area.
- rockemsockem 3y agoNASA is testing new designs right now to dampen supersonic booms with an eye towards changing that regulation.