Common Train Air/Rolling Resistance Values
Hi all,
I am working on a project relating the spring constant of a spring buffer and velocity of trains of different masses on an incline. I need to find a rate for how the train velocity at the point of contact increases/decreases as the mass values increases (this is the change in velocity over mass over several scenarios--not a time rate for one train in one situation). To find that rate, I've been looking for common values for air resistance or rolling resistance for a train. I'm having trouble finding these through Google--does anyone know of a good,resource for finding this kind of info?
Thanks!