Believe it or not, Melcraft had the idea of ram-air supercharging in the late forties!
The engine shown was described as the Supercharged Melcraft 29.
It is piston ported and instead of being in the rear, it's in the front as shown, right in the prop blast.
Does it work? Beats me - it's new, never run!
Spark ignition, of course.
Bob Z.