"Anybody tried one of those oxygen concentrators yet?" I looked into the idea when putting an O2 system together and found them impractical for a small aircraft. They are bulky, use a huge amount of power (compressor) and generate a lot of heat. I'm sure military & other aircraft have them designed for aviation use - or maybe not. I imagine they wouldn't work very well at high altitude.
I decided on an "E" bottle (24 cubic feet of oxygen) mated to a pulse-demand medical regulator and cannula. It works beautifully. Last trip to MVN I used O2 all the way from SEE and back and still had oxygen left over. The key is the pulse demand regulator (in combination with a pulse oximeter) and the large capacity bottle. I get it filled at a dive shop for .25 per cubic foot. Mike KSEE ____________________________________________________________ Woman is 53 But Looks 25 Mom reveals 1 simple wrinkle trick that has angered doctors... http://thirdpartyoffers.juno.com/TGL3141/518157025c2e157021a4cst04vuc