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

A very nice engine Gil, great to see it running.

I haven’t thought of vacuum making a power boost except in Newcomen engines. Are the condensers with vacuum simply a can with a 1 way check valve? I suspect the effect would boast even simples?

I have an RPM gauge, pressure gauges, dynamos and generators so could record a lot of numbers to see if such a device would boost power. I think I have a metal can with a cover and I know I have metal check valves... mmm...

One thing to bear in mind is you will need a lot of cooling water, plus you will need some means of removing the trapped air and condensate for it to work properly, otherwise you'll lose vacuum after a few strokes due to it filling with water and air.