[poindexter]

On a large engine such as the PW Wasp R4360, why would it be desirable to have supercharging and turbo charging?

Sea-level performance at altitude.

[valkyry1]

//That could be accomplished with one method or the other//

That could be accomplished with one method or the other.

[valkyry1]

//Sea-level performance at altitude. //

That could be accomplished with either method alone.