Build an electric wind Fan from scratchgreenspun.com : LUSENET : Junkyard Wars : One Thread
the team that can build an electric motor from scratch with a blade on it that produces the most wind over a period of time is the winner. If it is an hour, the wind speed would somehow need to be calculated or it could be set up as some sort of tug of war, set the two fans toward each other, the one that pushes an object across a line toward the other is the winner.
-- Richard James Retey (firstname.lastname@example.org), January 25, 2001
Anyone with basic electrical knowledge, some bearings, wire, and ferrous rods to make armatures and electromagnets can come up with a workable AC motor in like 1 hour. This challenge is too simple.
-- Original Ray's Pizza (email@example.com), January 25, 2001.