PURE wrote:I may be wrong, but as far as I know vertical movement is the only thing that effects speed, in theory. But when it comes to a not so controlled environment there are certain factors that can come into play. A heavier train (a full one compared to an empty one) does create more positive momentum.
So a full train keeps speed longer than an empty one.
But since the trains are longer, isn't there more friction, making the trains slower than a regular B&M train?