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Here is a page from Baldwin Locomotive Works literature on the Rushton stack. The center section was indeed cast iron, with the upper and lower sections rolled from either steel or copper. Also, a photo of a broken Rushton stack at the Southern Forest Heritage Museum in Longleaf, LA. Finally, a draw...
Quite a few early-1900 locomotives burning coal had a riveted smoke box extension added after they were built. I assume this was to provide more room for the accumulation of cinders.
In the case of the Reading 4-8-4s, these were rebuilt from 2-8-0s with shorter boilers, so the additional length was added to the smoke box. In the case of the others, I have read that with longer boilers, there were diminishing returns with lengthening the tubes and flues in terms of steam generati...
Fire???? That would probably work! And, probably anneal the copper also. When spinning, one would need to use lubrication and a soft forming tool, like wood, to avoid marring the copper. One problem would be how to re-anneal the copper if it work-hardens, without un-soldering the joint or burning u...
Metal spinning for the toroidal section of the stack would be very doable, especially with a soft metal like copper. The hard part would be figuring how to get the wooden form out, after you are done!
If nothing else works, you could make each flared end as a separate piece, with a copper sleeve over the joint. Silver solder the sleeve after the flare nuts are tightened up.
- Thu Dec 24, 2020 10:30 am
- Forum: Live Steam
- Topic: I Hate It When That Happens!
- Replies: 16
- Views: 1899
This was a boiler shell failure, a most atypical boiler explosion vs. a low-water crown sheet failure. I guess the explosion also severed the oco frame.
- Fri Dec 18, 2020 5:49 pm
- Forum: Live Steam
- Topic: Fire arch design for propane
- Replies: 29
- Views: 2242
I would agree with Baggo on the tube sizes and flow area. All of my experience has been with coal, not oil or propane. From what I’ve read, most of the steam generation occurs around the firebox, and this makes sense to me. Maybe this is less so with oil or propane. But, in my opinion, the main thin...
The formula for tube length vs. diameter was originally calculated for full-size locomotives, and I suspect that it doesn't extrapolate well to our small boilers, resulting in tubes that are too small. The reason is that coal won't fully combust in our small fireboxes. What fuel will you be using? I...
What is going to be the distance from the front tubesheet to the rear tubesheet? This is more significant in calculating the best tube diameter than the scale of the locomotive. The AMBC recommendation of 6mm minimum for “ligaments” is slightly less than 1/4”, which seems reasonable. You can probabl...