Chris wrote:
"Morgans" wrote in message
...
"Bill Denton" wrote

I believe airline cabin pressure is somewhat below 10,000 ft...
It can be set at anything the pilots want.

Not true, it is limited by the amount of differential pressure the plane can
take.

The certification requirement is that the cabin altitude be no
higher than 8,000 feet. On later aircraft, the pressurization
is pretty much a "set the destination altitude" and don't mess
with it. Back in the old days of flight engineers it took a
bit more management.

The new 787 I believe is being designed with both a lower cabin
altitude and also increased humidity for passenger comfort.