Larry, it's coming along really nice....great work.
I'm going to be making a valve or two pretty soon. Not having ever made valves from scratch, I'd really like to get a dimensioned sketch of your lubricator drain valve, both the body and the needle valve, if possible.
Posted By redbeard on 09/03/2008 5:47 AM
Also will add a spiral flue retarder to "grab" a little more heat from the fire. Then maybe I can get her to steam well enough to move on to the rest of construction.
redbeard AKA Larry Newman SA #1956
The "retarder" in the flue is a good idea. Here's something I remember reading about in one of the old Boiler Construction books from England, which I have now misplaced.
To add some more efficiency to the capture of heat, try adding up/down tubes to the exterior of your boiler & then cladding it all with your insulated outer brass shell. It will add some water volume and will put more copper surface in contact with water in the heated exhaust stream.
You're getting to that point where you can see how much you railtruck will haul, right??? Really looking great. The radiant burner coil is very clever.
I'm anxiously waiting to see what treatment you give the truck bed...wood stakes and rails or solid brass sideboards or ....