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

Hi Ben,...Yes, ...There's almost an addictive interest in trying to slow down the non-loaded rpm & hits per min but only so much can be achieved with flywheel/governor spring & weight mods & the stock firing hit "kick" indicates maybe too much stock compression exists..I ran some engine impulse power output to compression ratio flywheel inertia math numbers & it seems by significantly Reducing the Compression Ratio may be the Key modification to reach the ultimate Low rpm/hits per min goal..Since the sparkplug-cylinder head runs way to cold (even without water) anyway, I'm considering reducing the C/R by using 1/16--1/8" thickness rubber cyl head gasket spacer/thermal isolator to produce a hotter running cyl head cleaner combustion + slower running results...Happy motoring,...tom.