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

Doug, for a centrifugal pump you need a Stuart two cylinder engine like a Sun, Star, or Sirius. They will give you the high speed needed for a centrifugal pump for a better pump curve. A single cylinder will do the job, but pressure & flow will constantly fluctuate (pulsate) with every cycle. Nice work on the pump

Thanks,
I will have to experiment a little. I do have a stuart sun or sirius (i can't remember which at the moment)
crazydoug