Threshing using steam power looks like a dirty operation—a lot of smoke and dust.  These guys earned their lunch.

   This strange looking device was one of the early petroleum based tractors. What I find interesting is the radiator. It looks like part of a boiler from a stream engine as likely was. Engineering: start with what you know and expand on it.

   Someone invested a lot of time for this to have happened, and I admire their passion.

   Pile driver in action.  There was some pretty serious percussion in the ground as this ran it's demonstration.

   I prefer my cordless DeWalt.

   Attended the Rock River Thresheree today and observed a several old steam tractors.  They had over 20 this year and it was interesting to learn how they operated.

   Soft red blue.

   Blue bulb.

   Shape.

   Tim.