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...after WWII, both (SC & TC) were used together, one example being the turbocompound Curtis-Wright R3350-42 engines, which had a single-stage, two-speed, supercharger and three 'Power Recovery Turbines" (PRTs). The PRTs extracted 500 HP from the exhaust gases from the 18 cylinders and put it back into the engine crankshaft, boosting total output power from 2,900 HP up to 3,400 HP per engine...plus delivering lowest fuel consumption per HP at lean cruise, only about 100 gallons/hr per engine.
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