othugile
QUESTION Does the hauling capacity of locomotives automatically double if you run them in tandem, triple when run 3 units? For example,in Botswana, between Mahalapye and Gaborone I have seen in many occasions a single GT42 moving +/-2300T, does it mean a tandem would do 4600T? Let's eliminate issue of length of crossing loops What about factors like Brakes propagation rate, compressor capacity, allowable tonnages per train for the tracks and curve negotiation?