Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Interesting to note:
   Was messing with the pump some more on kitchen table, it will lift water with just about "any" amount of vertical stroke desired, from less than 1/8 inch up to 1 full inch of vertical stroke.
   Even more interesting to me is the short strokes provide really even continuous flow around 3/16 to 1/4 inch strokes near optimum. The long 1 inch stoke gives pulse-stop-pulse water flow.
  Looks like 3/16 stroke at around 60 up/down cycles per min would provide really nice even continuous flow. These numbers seem pretty easy to achieve with steam/stirling power.
   Also interesting is the piston to bore fit is quite loose with no seal yet it pumps well. Because of the low drag of no seal It feels like a really low power engine may be able to get this to pump with the right flywheel gearing.....to be continued!