Mrring on Mars ??

[Steamtrains]

Actually T I agree with Ed, big and heavy to combat the lower gravity, maybe #1 gauge? By the way T, we will miss you.

I think it's "backa..wards" - I'd take a smaller scale....Why..?? Inertia (the value of mass x speed)... The quantity of mass doesn't change whether you're here or in Mars, so a body in motion will have the same inertia in both places when operated at the same speed, and the train would go flying off the rails on a curve...To operate safely you would have to operate at a slower speed.

I think.....