This is a replica of a piston plane with KSP stock parts.
So, it is NOT a piston engine but a JET engine.
I just try to make the appearance of the Corsair with a J-20 "juno" basic jet engine.
I am quite happy with the global appearance.
But, I am not really happy with the shape of the tail fin...
Even with the use of a jet engine, the global caracteristics and performances are similar to the real ones.