Stories about U/G loco's I have plenty, Will dig out some pictures when I return from my holiday next week
Riding in a small enclosed passenger car one morning,traveling between two shafts, one of the idiots in the car reached out as the loco slowed and pulled out the link pin, he thought the loco would go on without us but instead the car started to run back towards the shaft we had just left,gathering speed all the time, Myself and one or two others decided to bail out,geting only minor grazes.but the others were more seriously injured when the car derailed. After the shift we dealt with him in the change house in the most approprete manner and the mine owners gave him a fine and his walking ticket
One mine had a Loco run by a gyro wheel housed in a helium tank It was wound up and would run for about 4 days without a load, it pulled 4 passenger cars with about 80 persons for two miles before requiring another spin.....Made iin Switerland by Oelicon..I believe there are busses running using this traction