Re: Surely...
It happens all the time with pilots and oxygen systems. Aircraft rated oxygen systems for small aircraft are very expensive. So, people buy medical oxygen tanks and regulators and try to use them in aircraft. The results are usually deadly.
You see, medical oxygen regulators are designed to operate at ground level. One side of the regulator diaphragm is vented to atmospheric pressure, witch is fine if the regulator is calibrated and then operated at ground level. Aircraft oxygen regulators on the other hand have a two stage design that compensates for changes in atmospheric pressure so that the oxygen flow is constant as the aircraft climbs.
Again, someone that owns a high performance airplane capable of high altitude flight is not a poor person, why save a few hundred bucks and kill yourself (and possible others) over it?
Biting the hand that feeds IT
