Keep trying, and failing, to start engine - what am I doing wrong?

[UrsulaMejor]

1) Set up cold loop with a gas, usually plasma (I tried plasma/oxy and it literally exploded - never again.

Yeah... You are supposed to put the plasma oxy mix into the combustion chamber to burn. If you introduce oxygen to heat, its going to burn, increase pressure, and maybe blow up the pipes.

Oxygen isn't flammable.

Oxygen + plasma is very flammable.

plasma by itself can't ignite without oxygen.

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