I looked into this seriously a few years ago. The earliest aviation O2
systems in WW1 used liquid oxygen systems. LOX has some advantage and some
serious disadvantages.

Positives:
Long duration supply for extended wave flights.
Light weight compared to compressed oxygen of comparable duration.
Small size

Negative:
Short shelf life . i.e. "use it or lose it".
Difficult support system. Essentially, LOX must be manufactured on the
gliderport for it to make sense. Such "air reduction" devices do exist for
medical LOX but they are expensive.
LOX can be dangerous for inexperienced people to handle.

The temptation is that used "wearable" medical LOX systems are available on
E-Bay cheap.

Bill Daniels


"Tony Verhulst" wrote in message
...
Bruno Maes wrote:
Has someone ever implemented a liquid oxygen system inside a glider?

Of course! See http://en.wikipedia.org/wiki/Perlan_Project.

Google is your friend,

Tony V.
http://home.comcast.net/~verhulst/SOARING