On Sep 9, 12:29*am, wrote:
On Mon, 8 Sep 2008 20:02:27 -0700 (PDT), Tim
wrote:

I always wondered why you couldn't mount a big "squirrel cage" fan on
a boat, those things put out a lot of air with less noise

or at least I would think so

Aircraft engineers looked at props for over 100 years and this is what
they came up with. The guys who design wind turbine generators use the
same type of prop. There must be something attractive about this
design.

Yes, it's actually the most p-practical way to move air.

But it sure is noisy!