Free Plans: David Kerzel’s C02 Engine

Here’s another set of free plans and construction notes by David Kerzel.  These are for a CO2 engine which is much smaller than his very beautiful hit & miss engine, which you can also get free plans for.  David says the flywheel is too thick, which should be easy to fix.  He also thinks the cylinder looks too long.

5 thoughts on “Free Plans: David Kerzel’s C02 Engine”

  1. Eric, steel balls are available at McMaster-Carr. There may be other places as well as probably cheaper. Search for ball bearing balls.

  2. Where have you placed the exhaust valve …because I am having a confusion if the co2 is sucked , the piston goes down …then how will the piston come up again ……!! Please help me out


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