Question about being unpressurized at higher (Class A) altitudes

es330td wrote in news:1189691258.415403.151350@
50g2000hsm.googlegroups.com:

My father has a C182 in which I have been to about 10K ft MSL. I am
currently working on my license and am considering building a Velocity
or Aerocanard, both of which have ceilings up into Class A airspace,
one as high as FL250. (Before anyone cautions me about building one
of these, I know two people with Velocities and a local builder who
has built multiple canard aircraft. I will have lots of support and
will have logged PIC time in one long before mine is built.) While I
know that oxygen is required at altitude, what is the effect of the
lower pressure on pilot and passengers? I am doing this in part for
the purpose of transporting myself and family to visit friends and
relatives and am curious about the effect on my two children,
currently 3 and 5, and whether this will make them less pleasant to
fly with.

TIA


A, your kids will be teenagers at least by the time oyu get the thing done
(ask me how I know this)
B, pax on O2 are usually not happy pax.. It's a pain in the ass, really.
C. You'll probably almost never go up to altitudes where O2 is required for
several reasons unless you're the exception who proves the rule..

Bertie