Why don't locomotives have mechanical transmissions? A transmission is necessary to reduce the high rotational speed of the diesel engine to the low speed, high torque of locomotive drive wheels.
Understanding brake horsepower: Diesel engines, like all engines, are built to perform a specific function. In a locomotive, that role is to provide power to move freight cars from one place to ...
NIKKO, Tochigi Prefecture--Steam and diesel locomotive operators are ... The biofuel is being used to continually maintain the steam locomotive engine’s fire, which then protects their boilers.
and in the locomotive they are used to combine the output of more than one engine. The loco had four smaller-than-normal diesel traction motors that could be combined, but even then, it wasn’t done.