Mr. Inventor built himself another forge this week. He cut apart a propane cylinder and used the top for the place for a fire. He welded it to a pipe and used the bottom of the cylinder for a stand. The pipe coming out the side is to attach a blower to (he uses an old vacuum cleaner) for air for the fire. He welded a metal grate inside to hold the coal fire up off the air hole.
Here is the forge in action. It worked great—it was so hot they could hardly get close enough to work with the fire! However, it melted the grate. I’m not sure what he’s doing next!