ORIGINAL: Sport_Pilot
And you don't need supplimental Oxygen at that altitude-I have backpacked for days at 12000 feet, with many excursions to 14000+ during that time. It is a common passtime...
The limit for aviation is much lower than for camping and mountain climbing. Makes a differance when you climb to altitude in minutes instead of hours! Your body doesn't have time to adjust, plus the relatively sudden lack of oxygen affects judgement as well.
No argument here. Obviously, my statements went way over your head.
Regulations are made to take care of the worst possible case--which is why military pilots pretty much go on oxygen at take-off, while if supplimental O2 were required at 10000 feet, nobody could fly a private airplane in most of the Western US. The fact that the human body can run fine at 10000 feet would indicate that a glow engine will also.
In fact, normally aspirated engines have been known to operate at considerably higher altitudes than that.