Ok here we go.
The dimensions after the edges are folded over.
Width- 2 in.
Length-2 3/4
Tubing is 1/4 OD copper and 8 inch long.
Solder is plumber acid core.
The jig is made by cutting a hole in the bottom part as big as you want your engine to be, the dished part.
The other top plate had a piece of metal about 1/8 th in. thick tapered on the sides that fits flush in the hole in lower plate.
Lay a piece of light tim on the jig and center the top and hammer or press them together and it will form a dish in the tin.
Then slit the corners and bend about 1/8 th in of the edges up.
Then drill a hole or two depending how many tubes ya want in the end and solder the tube in as shown.
Put a bead of high temp silicone around the inside edge of the plate as shown and lay a piece of copper or pop can tin in and bend the edges over and squeeze them down with a pliers.
Let the silicone dry as i didn`t because i wanted to get this video done for this thread and it sprung a small leak.
Prime the engine, be sure the boiler is full and water is coming out the tube. Hold your finger over the end of the tube and put in the water.
Put a candle under the boiler and test run.
If ya have any questions ask away and i`ll try and answer the best i can.
Tube size and the number of tubes is up to you, this size engine normally would have two tubes half as big as the one i put on it, seems to work fine.
Video
