raveney
Well-Known Member
Denatured alcohol was not available locally, but was able to buy a quart online. I tried several different wick materials that I had with a score of different amounts to alter the fuel/air ratio. Best results with some loose strands of fiberglass wick in the bottom of the barrels, and cotton ball shapes of forge insulation on top. Of course it burns differently up inside the smoke box so I used a mirror to eyeball the flame color
I also made a couple of aluminum spacers to move the burners and tank lower in respect to the boiler. It was improving to the point that I would be happy as a static display model, but I really wanted a crawler which needed more steam pressure. I added a third burner and that made it much better.
Results are below
Best operational procedure is to fill and bleed boiler and heat up with smoke box door open. Once we build 20 PSIG while running on bench (10 minutes), refill alcohol and transport to a flat surface. It will then run until the water runs out which is between 8 to 10 minutes. All of the trials and tuning has given the model a decent patina of drips and scuffs. I like it better than fresh paint. What do you all think?
I also made a couple of aluminum spacers to move the burners and tank lower in respect to the boiler. It was improving to the point that I would be happy as a static display model, but I really wanted a crawler which needed more steam pressure. I added a third burner and that made it much better.
Results are below
Best operational procedure is to fill and bleed boiler and heat up with smoke box door open. Once we build 20 PSIG while running on bench (10 minutes), refill alcohol and transport to a flat surface. It will then run until the water runs out which is between 8 to 10 minutes. All of the trials and tuning has given the model a decent patina of drips and scuffs. I like it better than fresh paint. What do you all think?