Bob, There are a bunch of links between the wheels and the valve rods. These serve to control the admission of steam to the cylinders. This includes reversing.
Bob, There are a bunch of links between the wheels and the valve rods. These serve to control the admission of steam to the cylinders. This includes reversing. Look up “valve gear on the web. The most easily understood is the classic Stephenson gear, but locomotives mostly use Joy or Walshaerts gear.
