[Greenbuilding] 200 mph ceiling fans

[nick pine]

Benjamin Pratt <benjamin.g.pratt at gmail.com>

>Manufacturers--99 percent of them anyway--don't care about morals. And most 
>of them don't care about real profits. What they care about is
what their stock is doing...

Maybe not, after the IPO :-)

Sacie Lambertson <sacie.lambertson at gmail.com> writes:

>John, honing in on that last bit regarding the fan moving at 200 mph over a 
>body, what is the  speed of a ceiling fan--at the low, middle and high
speed?

Wow... 200 mph would be a category 5.7 hurricaine... 
http://en.wikipedia.org/wiki/Saffir%E2%80%93Simpson_Hurricane_Scale

200 feet per minute is about 1 meter per second, achievable under the blades 
of a medium speed ceiling fan, according to Fig 6 in 
www.fsec.ucf.edu/en/publications/pdf/FSEC-CR-1770-98.pdf

Nick