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Indicated vs. Brake Power

Inside this lesson
  • Define mechanical efficiency ηmech = Pb/Pi and friction power Pf = Pi − Pb
  • Compute brake power from indicated power and mechanical efficiency
  • Explain why mechanical efficiency falls at part load
  • Relate brake power back to Module 4's power-chain definitions

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Educational content covering topics typical of a first- and second-year marine engineering / naval architecture curriculum. Not a substitute for accredited coursework, and not suitable for real vessel design, operation, or safety decisions without review by a licensed professional engineer. References to classification societies, SOLAS, or MARPOL are descriptive context only, not compliance guidance.