T o d d P a t t i s t writes:

To answer the original question, I always carried oxy in my
glider, and never in my Champ (65 hp airplane). The
glider's been to above 30,000', the Champ to only 10,000'.

You've been above 30,000 feet in a glider? How did you get up that
high? Who towed you?

--
Transpose mxsmanic and gmail to reach me by e-mail.