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New Idea Makes Box Fan Conversion Very Easy | 53 comments (53 topical, 0 editorial)

Re: New Idea Makes Box Fan Conversion Very Easy (3.00 / 0) (#11)
by Norm (peppysue@suite224.net) on Mon Jul 4th, 2005 at 12:46:55 PM MST
(User Info)

On a breezy morning I couldn't get it to spin up by itself(cogs too much), but after giving it a spin by hand my multimeter showed it was producing 31.4 volts AC using the 20" fan blade.
Today I added a bridge rectifier (25 amps-50 volts) and spinning it by hand I can get a 12 volt bulb to light.

You don't really know what the rpm is ...do you?
Here is a quick simple way.....

count the number of threads per inch ...grab the nut and see how far it travels in 10 seconds.
...if you're really a new guy you might have missed this.....

http://www2.suite224.net/~peppysue/

a three blade 3ft. diameter rotor with a wide root
might spin this thing okay....
( :>) Norm.
( :>) Norm
[ Parent ]

New Idea Makes Box Fan Conversion Very Easy | 53 comments (53 topical, 0 editorial)

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