Power is speed times force, so I'd think that doesn't tell much about grade climbing. Extra tractive effort on a slope is train mass x g x grade. So, ignoring force needed for acceleration and train resistance at standstill, for the Lötschberg mountain line maximum grade of 2.7%, 300kN would in theory be enough for 1130 tons (while 2x300kN would do it for 2260 tons). The locos are rated for 650 tons at that grade.
(Back to power, 5.6MW is enough to maintain 300kN up to a speed of 67.2 km/h.) *Lunatic*, n. One whose delusions are out of fashion.
The first is for the Vossloh Euro 4000 diesel -- as typical for six-axle heavy diesels, it shows a monotonous decline with speed, and the maximum power hyperbole (where TE ~= max power/speed) is reached very quickly:
Now here is the graph for the BLS Re 465, a four-axle high-power electric, under ideal conditions; with dashed curve for when the loco utilises only maximum continuous power, and the parallel solid curve for when it uses maximum one-hour power:
Under ideal weather conditions, before reaching the maximum power hyperbole, traction control limits TE to the rated maximum very strictly. (From actual measurements done on one new high-power loco by colleagues, I'd say precise to the kN.) *Lunatic*, n. One whose delusions are out of fashion.
