"Wayne" wrote in message
news
1 mile high is a pressure of around 12.2 PSI. so dropping from 5280'
to
sea level (14.7 PSI) (splash) would make a 2-1/2 PSI increase in pressure.
If you did that in 1 minute, then that would be 5280 FPM decent rate.

Compare to S.C.U.B.A. It's not that hard on the ears. In sea water,
every 33 feet is equal to 1 atmosphere of air (14.7PSI) A realitively fast
decent (2 minute) 132' would be like dropping around 23-1/2 times faster
or
124,000 FPM A 58.8PSI increase in less than 2 minutes and it's not that
hard
to do.

Anyone seen that girl that did that free dive to, I forget 500 feet
deep
or some crazy amount like that?

Try it with a cold and it can get real uncomfortable though.

The trip back up is where you need to go slowly or risk the bends.
Won't happen in a free dive. This is a result of taking a breath from some
depth (as little as 4 feet down) and then not exhaling when returning to the
surface, or staying at a certain depth for a long period of time and not
using decompression stops on the way back up :-)

I have only ever
dropped fast like that a few times in a plane. What's that equal out to in
a
160 nmph dive? I never realized an altimeter could move that fast.

What a great picture though. Next time I go far away, I will have to
hold the altitude, and get a shot like that. Yours turned out very well.
That was through a window?
Wayne



Benefits of a big head, I guess. ;-)

You routinely descent at 3500 feet per minute, Ben?

My ears never bother me in normal flight, but dropping *that* fast might
cause someone some pretty severe discomfort.
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