[djf]

Yup.

Imagine it were mounted on something in front of you like a bicycle wheel, with the piston right there.

Whack the piston with a hammer so it goes down into the cylinder.

The unit will spin. It HAS to spin. It’s the laws of physics.

[chaos_5]

So what does the “whacking”?

[Jotmo]

That still doesn't answer why you need the spring, or piston for that mater.

I looks like you've made a turbine with little spring loaded pistons in the rotor buckets.

Got a better picture with the combustion chamber included?

[mrsmith]

#Whack the piston with a hammer so it goes down into the cylinder.#... and then pushes back against the wall?
That’s what I thought.
Maybe if the wall around the rotor is slightly eccentric it could push all the way around but if hard the piston will just bind against the wall. If it’s made of something soft it will wear away.

Build one- the beauty of this, ifit works, is it’s simple to build.