On 15 Nov 2009 00:17:31 GMT, Han wrote:

mm wrote in
:

On Sat, 14 Nov 2009 14:05:53 -0800, David Nebenzahl
wrote:


Then there are those exotic spirally ones that spin on a vertical axis.
Anyone ever seen those?

Only in pictures. I think they're the work of the devil.

I have seen small ventilators like that on roofs. Not to generate
electricity, but the same priciples apply.

Well, that's okay.