"Orval Fairbairn" wrote in message
news
You can't store enough compressed air to make it practical -- perhaps
they use a very long air hose?

No... it has an optional gas-powered kicker motor that also recompresses
the carbon-fiber air tanks. Just caught something about it on television
the other day. Plus, it's loud as hell; sounds like somebody's driving an
air compressor.

-c