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"Christopher A. Brown" <chbrown@fr*.sc*.fs*.ed*> wrote (Subject: Re: cryogenic rebreathers):- > I was reading an old (60's) copy of Skin Diver one time and saw a good piece > on a liquid oxygen scuba system. Jordan Klein, long time U/W filmmaker > (Oscar for "Thunderball") was involved in developing it and many other U/W > devices. Big problem is keeping the oxygen cold enuff to stay in liquid form > -- takes a double layered tank, thermos bottle type arrangement. The picture > of the fill station showed a cloud of steam all around the place. It didn't > look ( and wasn't) practical as an open circuit system. Forget closed. > Closed circuit systems that work, reliably, are complex/expensive enuff, > IMHO. I remember that article. It was about a liquid-<air> <aqualung>, an open-circuit set. It said that there had been a problem making sure that the oxygen and the nitrogen in the air didn't fractionate apart as it evaporated as it was used. It worked. I wrote off to Skin Diver for information, and Skin Diver told me 2 addresses; but the people at those addresses never replied. Skin Diver told me that Mako (the firm who was developing the liquid air aqualung) was involved in `transactions with another firm'. I suspect that this liquid-air aqualung was likely suppressed by some #@$% funny-business undercover commercial or governmental going-on, not by practicalities.
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