The proposed rule change on supersonic flight overland would make it okay to have booms as loud as a jackhammer: https://www.commerce.senate.gov/public/_cache/files/0238c447-3e61-475b-bbb1-27eeb54c3831/A8CDC5A8788C7557D876E4B78421F805.s.-1405-lee-3.pdf …
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LHR to ocean: 75 miles. CDG to ocean: 179 miles.
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Concorde would head directly to the coast at Mach 0.95 and that's only 100 miles from CDG to Dieppe. http://www.airliners.net/forum/viewtopic.php?t=949591 …
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