I was watching the Moody/Martin film of the SR&RL the other day and during the winter sequence I noticed that every engine except #24 had a pony plow. This included #17 (old, pilot truckless Forney), 9 and 10 (technically passenger engines designed for speed, not tractive force) and #18 (lighter, older prairie).
Of all the engines to be out in the drifts with a bare pilot, there was #24: bigger, heavier, newer, more powerful: on the surface of it the best plow horse of the bunch.
-it just doesn't make sense!
Come to think of it, I don't think I've ever seen #23 with a pony plow either.
It makes me wonder if there was something about the SR&RL pony plow design that just didn't hold up to the tractive abilities of the biggest engines and once they crumpled a couple they gave up and kept the big guys reserved for shoving a wedge plow instead.
-any thoughts?