Re: Silent Flight; Fuel Cells Are the ONLY Solution

For the max 66.7% propulsion efficiency blimps/airships need to move a
LOT of air at only TWICE the craft speed [read: very slow ~ 40 mph]
which means big slow moving quiet props.

It would be sooo much fun to silently drift up a canyon. The loudest
noise would be your own breathing.

The mule deer or cougar would, of course, be startled by the shadow but
not before you got some good video.


Bret Cahill

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Relevant Pages

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