Well, it depends. In Britain or North America, locomotives are generally diesel-electric or pure electric, but DMUs normally use hydraulic transmission. The Yanks export a fair amount too. AFAIK, eddy-current brakes are not normally fitted to British or American trains. The Americans prefer to use rheostatic braking, where the traction motors are turned into generators and the energy is dumped into resistor grids.
However the Germans and Finns do prefer hydraulic transmission for diesel locomotives as well as DMUs. The Germans like to export too. I understand that the high-speed trains in Germany are electric-powered and carry these brakes, but I don't know whether the French ones do as well. However, high-speed trains run on their own special tracks, where the signalling can be designed around the trains, not the other way around.
However the Germans and Finns do prefer hydraulic transmission for diesel locomotives as well as DMUs. The Germans like to export too. I understand that the high-speed trains in Germany are electric-powered and carry these brakes, but I don't know whether the French ones do as well. However, high-speed trains run on their own special tracks, where the signalling can be designed around the trains, not the other way around.
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