Mike Bourget wrote: - "Ten thousand feet is really just an easy to remember arbitrary number and I imagine when this was set by CASA or its predecessors a bunch of ex RAAF people sat around and said "well the Air Force says 10000 so let's use that" ...."
The establishment of a 10,000' limit is not arbitrary but based on research on the physiological effects of a reduction in partial pressure of oxygen with ascent to altitude, taking into account the fact that effects vary between individuals. The air force used to insist on oxygen use above 8,000' (and may still do). Christopher Thorpe _______________________________________________ Aus-soaring mailing list [EMAIL PROTECTED] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
