As this little engine is progressing steadily towards getting to a running state, I thought I had better do something about the gas burner I will be using.
These are some of the parts that actually make up the gas burner.
I purchased online a new pipe and jet holder plus the right sized jet. For the price they cost, they are not worth making yourself, just a load of machining hassle. Also needed were a couple of end feed plumbing bits, which I managed to pick up while I was out yesterday. Not exactly the correct ones shown on the plan, but they will do just as well.
The plans call for a brass mixing chamber pipe to be made, I don't know why, as it can't be for cosmetic reasons, because it is hidden under the engine, a bit of 15mm copper plumbing pipe will do just as well.
If you look at the plumbing bends, on each flange they have a stamped in safety code. They will look awful on the finished burner, so they have to go.

Mounted up onto an expanding mandrel, some good quality cutting lube (standard cutting fluid for copper is tallow, or as a substitute, full cream cows milk) and a change to a new tip soon had them turned off using shallow cuts.

There is a little of the lettering left, as it was rather deep, but that will come out in final polish. Looking better already.

Next came the four air supply holes for the gas jet and mixing chamber, they were soon drilled in their correct positions.

Now ready for first stage silver soldering.

I set it up this way to keep the top part in the correct position to the other two pieces. It needs to be totally central in position, not tilted over one way or another. The joints were set up with Tenacity 5 flux and 1/16" easyflo silver solder. Thicker solder than normal was used because the joint cavities will take a bit of filling.
The top joint was completed first, then once set, the job was laid down and the second joint completed.

A quick dose, first of steel, then brass wire brushes on the buffing machine soon had it cleaned up enough to go onto the second part of the build sequence.

This is roughly where the burner will sit on the finished engine, with the refillable gas tank at the far end, just past the flywheel.
The engine is up on bolts at this time, as I won't be making the wooden bearers until I get well into the finishing off bling sessions.

There needs to be some parts made and fitted to finish off this burner, they will be shown in the next instalment.
Bogs