Idea for New Challangegreenspun.com : LUSENET : Junkyard Wars : One Thread
I am suggesting building a portable welder (AC or DC). I noted that a lot of the time the equipment is breaking down during a challenge. A portable welder would be nice. This is the bases behind this suggestion. I think it could be made from an engine and an electic motor ran in reverse or ganging together a number of auto alternators to get the voltage and amps needed. A challenge would be a welding contest using the units. Your comments...Thanks I enjoy the show alot and will be looking forward to the future ones.
-- Joseph Plankinton (firstname.lastname@example.org), March 06, 2001
That's a good challenge, if the yard isn't seeded it would be more difficult than it sounds. It takes at least 10 killowatts to power a good stick welder, and I don't think that a wire feed welder (which uses less power) would be easily buildable. A 100 amp automotive alternator puts out about 1.2 killowatts. Using batteries would require some kind of current control, possibly a big starter motor with a brake or some kind of load would work for that.
-- Waddy Thompson (email@example.com), March 07, 2001.