Look up “thermosphere”
http://en.wikipedia.org/wiki/Thermosphere
That citation suggests that it
is above his jump altitude. But, I wouldn’t be surprised if
he was approaching the lower levels of it.
Gordon C. Alling, Jr.,
PE
President
acumen Engineering/Analysis,
Inc.
540-786-2200
www.acumen-ea.com
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of
marv@lancair.net
Sent: Monday, October 15, 2012 2:54
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re:
skydivers-supersonic-24-mile-jump
Jarrett
Johnson <hjjohnson@sasktel.net>
wrote:
"""
Some of that temp rise will be
aerodynamic heating. I know at 280knts and
24,000ft I'm seeing 10-15decC
rise in temp... At 800+mph the temp rise would
be a lot higher, even at 70K+
ft.
"""
Airspeed definitely wasn't the case
here.. this was during the ascent, when he was rising about 1000fpm, maybe less
(don't remember exactly) but his speed over the ground had by then diminished to
15-20 knots, just floating along with the flow up there. I, too, am
curious about why ambient temps started to rise as altitude increased... I'd
have figured it to just keep going down right in step with the ambient pressure.
It'll be way interesting to hear the actual
reason.
<marv>
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