What emerged from my workbench, isn't the most realistic in the world. The design is pragmatic. Square edges because that's what's easiest to cut in 2mm Plastikard. Side skirts because I needed to hide the wheels. Even I knew they weren't realistic.
Underneath, the chassis is a rectangle of square brass tube soldered up, from which dangle running gear made from Coopercraft 16mm parts. Handily, these were available as a reasonably priced pack, but no loco ever ran on curly-spoked wheels.
Power is a cheap motor driving a single axle through some Proops (remember them?) pound pack gears. 3 AA batteries provide the go, and a DPDT switch the control. To say the model runs slowly would be to underestimate it's lack of forward progress. Plenty of power though, you just better be not in a hurry.
The body detail owes a lot to old plastic kit cars. While the model might not be fast, it's powered (apparently) by a honking great V8 engine. I have no idea why its mounted back to font, and I didn't really understand which bits were engine and which gearbox.
Crew is an Action Jack figure with a paper overall to hide the joints in his lets, and some Milliput hair. The headlight is a Playmobil cup with the handle cut off and wires added. I suspect the lens comes from the spares box - I never threw bits away.