In article peqac.41666$JO3.31503@attbi_s04, Mike Dargan
wrote:

Suppose someone made an airliner capable of zooming from London to Tokyo
with a top speed of 5,000 mph. Would would be the minimum realistic G
forces that the passengers would experience going up, and coming down?

Also, wouldn't the vehicle be rather hot once it landed?

The G forces going up depend entirely on what type engines the craft uses to
get to the starting speed of the SCRAMJET engine(s). It's possible (and likely)
that it could be no different than a typical commercial flight now, due to
passenger concerns. Once at speed, normal 1 G and glidedown also no
different than commercial flights, except a lot longer.

As for the heat, if the post touchdown taxi is anything like it is at LAX,
the vehicle will be stone cold by the time it gets to the gate.

--
Harry Andreas
Engineering raconteur