GTB wrote: ↑Fri Jan 07, 2022 10:44 am
The boiler has a Salter spring safety valve on top of the dome, mostly under that polished brass trumpet cover, but the spring column is just visible beside the cover. Presumably there's a hole in the roof for steam to escape, unless the loco doubled as a mobile sauna.
I'm afraid that I'm getting myself bogged down with detail on this project, instead of getting on with actually building it ( although it is getting there and does actually run). My excuse is that the weather is too cold and damp to be able to go out into the garage and paint it!
Anyway, I'm after advice/suggestions re the safety valve. As Graeme says, the spring column is fairly visible to the right of the polished dome cover, and by enlarging the pic, it is just possible to make out the horizontal arm linking the spring to the valve on the dome. However the arm looks as though it goes
behind the dome cover, which seems very unlikely, so would there be a slit or hole in the polished cover?
- Screenshot 2022-01-25 06.56.58.png (297.41 KiB) Viewed 4556 times
The other two points about the SV arrangements are
(1) the vertical pipe out of the top of the cover ends in an upward facing bell-mouth a short distance from the roof and a plain piece of pipe has been joined to it to extend it up to a presumed hole in the roof This again tends to suggest that the complete assembly came from a steam launch originally.
(2) the photo colourisation suggests that the cover is polished steel, whereas to my limited knowledge they were normally brass. Any thoughts anyone?