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Following from the very helpful advice I got over the Ashanti Goldfields diesel, here is something equally obscure, which I have struggled to sort out and failed.
This a Hagans, where 1 set of cylinders powers 2 groups of driving wheels, 1 fixed and the other articulated. In this case 6 wheels are fixed and 4 are in a separate swivelling truck, the 2 being linked by a complex arrangement of levers. I did not try to build it as a single loco, as I believe that MSTS will not handle bogie wheels of different diameters, so I have 2 engines, the 4 wheel truck being the second, As it stands in the screenshot, it looks more or less right (with some work needed on textures!), but I can't get it to look right with a train.
The loco is a train with the main loco, followed by the swivel truck, so the real train has to follow the swivel truck and the swivel truck the main part, whereas in reality, the swivel truck is within the main loco. At the moment, I am trying to juggle lengths of the 2 portions to get them in the right relative positions and get the couplings (at both ends) to fit those of the rolling stock, and not be halfway through them. This is the same problem as a Mallet I suspect, but with the fixed and moving portions reversed, but what is the answer? (!)
