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Steam turbine
Charles Parsons · 1884
The steam turbine was not an incremental upgrade. It was a new mechanical paradigm: reaction-based, inherently scalable, and immediately deployable for electricity and propulsion. Its success came from eliminating reciprocating inertia, enabling higher speeds, smoother operation, and orders-of-magnitude growth in unit size. It delivered what it promised—cheap electricity and naval transformation—without hedging or delay.