[RRuger]

The real reason the P47 sounds different is that it is turbo supercharged. I has a totally different exhaust note due to the fact that turbos are driven by the exhaust gas, and that gas is routed to the turbo and not just dumped out the side of the cowling via short stacks.

This makes the P47 much quieter externally than other R-2800 powered aircraft.

A similar situation occurs with the Wright R 2600 installation in the B-25 and B-17. The 25 has mechanical superchargers while the 17 has turbos. The 17, even though it has 2 more engines is far quieter than a B25, both internally and externally. My flight in a real B25 was the loudest thing I have ever experienced.

That's an interesting tidbit EL :wink: