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> On Jul 5, 2018, at 12:16 PM, Mike Stirewalt via KRnet <> 
> wrote:
> 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
> unobtrusive. 
> 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
> ____________________________________________________________
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