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Not economically feasible for most pasengers.My brother-in-law commuted from NYC to London on the Concorde on his employer's dime (major record company senior exec), but that doesn't mean most passengers would use it even for typical air travel.
I remember when I was flying all the time, probably 15 years ago, and they slowed the flights down by about 10% to save money on fuel.
Yep. Supersonic drag makes it a fuel hog. Hypersonic will be even worse. Faster than sound travel will always be very expensive. Physics cannot be denied despite wishful thinking.
Exactly!You gotta push those molecules out of the way somehow!
There are fewer molecules at 90,000 feet.
True. But a Mach 5, you hit the ones that are there pretty hard and fast.Which generates more heat on the skin surface? Airliner at @ 30,000 ft and 560 mph or this @ 90,000 and 3,800 mph?
I wonder if air could be injected into the atmosphere to provide a slip surface with low friction like supercavitation with a torpedo?