The Solidworks design is still under development, but more details have been added and some technical parts were updated.
LNER number 5361 was chosen as the model's temporary 'work number'.
This loco was built by the Great Eastern Railway in 1889 as number 836, changed to 7836 by the LNER in 1924, and later in 1946 to 5361. The British Railways added a 6 to the number, so as 65361 it was withdrawn from service on 16/09/1962.
The locos, of which 289 were built in several batches between 1883 and 1913, during their existence had some differences and underwent some changes.
GER 836 was built in 1889 under work order T22 at Stratford.
See https://www.lner.info/locos/J/j15.php for more information
This version had the low cab cut out and the slotted shapes in the tender frames.
The cab was laser cut and held together with some neodymium magnets.
This gives a first impression of the size of the loco.
Making the outer wrapper and the firebox wrapper; starting with cutting the sheet material. I can not cut 3mm thick copper with my guillotine shear, so I used a large hand saw and some elbow grease.
Making a straight reference edge on the milling machine.
A wooden former was made of a set of MDF plates, glued and screwed together. These plates were made with the CNC milling machine.
With a clamp, the copper plate is centered and aligned on the former.
After annealing the 3mm plate can be bent by hand by pressing and rolling the assembly over the workbench.
Reheating for the next operation.
Clamping the top, the sides can be hammered down, with the aid of a large block, to spread the force and prevent dents in the plate.
Almost there, but due to the hammering, the plate get hard again and needs to be annealed again.
The flame of the propane burner curves around the surface.
The final forming is done with a round piece of wood, that is used as a hammer.
Final check against the firebox plate.
The wrapper is now cut to length. A bit of extra width was taken into account, to correct a possible skewness. But in retrospect it was not necessary; the wooden former keeps it straight and aligned from the start on.
The firebox plates and wrapper are ready.
The outer wrapper is also made from 3 mm thick copper. Same working procedure as the firebox wrapper, however more heat is needed for annealing.
Until here, all bending was possible by hand.
Then the clamps and wooden blocks are used to bend the sides.
For the final bending operation, once more the wrapper is annealed.
Checking the wrapper on the frame of the Y14. My 3½ inch Mona standing next to it, is also in the workshop for a 'general overhaul'.
A lot of copper......