Zipper said, 

> "Oxygen is REQUIRED at 14k cabin altitude for pilots. It is recommended
well below that, and for good reason . . . "

For just putzing around to find out ones service ceiling we can all get
by without oxygen.  Everest has been climbed, after all, without oxygen. 

For cross country travel though, it's immensely valuable.  I installed my
24 cu. ft. "E" bottle several years ago and always use it if going
anywhere beyond my local area.  The best example I can think of for how
very valuable it is is when fatigued after a long day's flying, coming
into a strange airport at night, and not being able to figure out which
end of the runway is which or not being able to understand and follow ATC
instructions if in controlled airspace.  I'm always at 11.5 or 12.5 or
higher where efficiency is so much better and you can't do that without
O2 and hope to not have problems, at the very least wind up with a
horrendous headache.  At worst one's brain and night vision gets so
impaired that you run into a mountain or tower or just simply crash it
trying to get it on the ground, particularly at night with winds.  I got
away with not using oxygen for all of my youth and middle age, even
flying the Andes (not with the KR), but I was lucky.  These days I use
the cannula and Halos (Quiet Technologies) and have often forgotten that
I have them on when exiting the plane - both items being so light and

What motivated me to put oxygen in the KR was the debilitating headache I
got on my first trip to the Mt. Vernon in 2007.  I live at sea level and
after many months of not flying, going from SL directly to 11.5 for
several hours gave me such a headache it took me a full day in bed at my
first stop in Gallup, NM before I could continue.  

I use an inexpensive medical pulse-dose regulator (Devilbliss PD1000) and
have the bottle mounted behind the seat out of the way.  It's mounted in
the corner against the side and bottom the fuselage with the regulator
sticking forward just enough that I can control it.  I cut a semi-circle
into the side of the seatback for the regulator to poke through.  My
baggage insert sets on top of the tank so it doesn't interfere with my
baggage capacity plus the weight of baggage  is an additional factor in
keeping the cylinder firmly in place regardless of turbulence.  I get it
filled at dive shops.  Although this has worked very well, a more elegant
solution would be one of the relatively tiny oxygen concentrators on the
market (such as the Inogen One G4) that run on 12 volts.  

Mike Stirewalt

Oncologists Are Freaking Out After Officials Release This

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