I loaded a few goods waggons with weight until the loco ground to a halt, then weighed the load including the waggons and converted it into Newtons - which is the correct unit of measure for pulling force (at least for small things).
I also program the chips to represent what I think are realistic top speeds and power curves (lower and middle speeds too) for the locos. I'm not sure if this alters the pulling power. Basically I figure that as the A4 was the fastest steam loco, it gets top speed on my track. The Merchant Navy Class a bit less and the goods locos less still.
Perhaps one day we could get a table of speeds together for various locos to do it more scientifically, but for now the speeds look fine.
I'll double check later on to see exactly how many coaches this translates too as I have been building up my collection recently and now have a good number to test.
I also program the chips to represent what I think are realistic top speeds and power curves (lower and middle speeds too) for the locos. I'm not sure if this alters the pulling power. Basically I figure that as the A4 was the fastest steam loco, it gets top speed on my track. The Merchant Navy Class a bit less and the goods locos less still.
Perhaps one day we could get a table of speeds together for various locos to do it more scientifically, but for now the speeds look fine.
I'll double check later on to see exactly how many coaches this translates too as I have been building up my collection recently and now have a good number to test.