While discussing the cab beading, a gent (Dave Lester) on RM Web pointed me at a photo which shows the tops of the cab and upper boiler of a couple of J6’s and other locos stabled at Hammerton Street Depot in bradford in the period that this loco is destined for (the photo is on page 38 of Great Northern Railway Engine Sheds volume three – I have the three volumes in my library). What the photo lso shows is that the Safety valves don’t just sit on the top of the firebox as you might think from ground level photos.
This is a snip from a scan of the photo that I referred to
As you can see the base of the valves are inset into the boiler clothing and fastened to the top of the firebox with studs. Yesterday’s task was to replicate this with my trusty filed rod and tube.
The next task is to cut out the firebox top so that I can mount this in place – I may need to trim the mounting plate as I had cut it big enough to hold while drilling all the holes with my pillar drill.