Pile Driver
Locobreath;
Very nice work, I built one in "N" scale several months back. Had a Line drawing from the White Pass & Yukon RR shops to work from. They had built it in 1901 using an old flatcar as the base. Their drawing has the flat car, with no front coupler, then a swiveling base for the pike driver so that it can swing approx 30 degrees left and right.
The way that yours is set up, the front coupler is in the way of the pile driver(?) and it can drive piles only straight forward of the car(?).
George