08-23-2009, 04:57 PM
I think it's a simple matter of physics. In photographs where the loco and tender are idle, any tilt will be far less noticeable or nonexistent. However, in photos where the train is moving, the tilt becomes much more visible. I would imagine that the faster the train is traveling, the move obvious the tilt becomes.
When an object accelerates, the rear end drops down. There is a lot of fancy math involved in calculating spring rates and weight transfer, but we've all seen and experienced this happening in our cars. If the rear end of the loco drops during acceleration or while at speed, it only makes sense then for the nose end of the tender to dive down since they are coupled together.
When an object accelerates, the rear end drops down. There is a lot of fancy math involved in calculating spring rates and weight transfer, but we've all seen and experienced this happening in our cars. If the rear end of the loco drops during acceleration or while at speed, it only makes sense then for the nose end of the tender to dive down since they are coupled together.
Tony