Wow, is that a working model? I see an umbilical cord out the back end of it.
The "Doubler" is a strange way to immitate a hydraulic shovel IMO. Yes I have to consider the time period too! Found this transport story last night, wow, can't immagine walking a steam shovel 190 miles to the job!
http://val238.tripod.com/steamengine...wold/id11.html
Cheer's, Neil.