I moved this over here for 50z0s or was it 5ozos. I'm new to this board and new to "O" guage trains. I bought a Williams (I think 464) engine and tender. In the back of the engine is a knob that can be turned. What does that knob do? Sorry to be so ignorant, but I am, lol.
That is probably the flywheel that you are talking about. It allows the loco to drift after you turn off the power.
Regards,
3rail