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The power of a normally aspirated piston engine decreases during a climb with a constant power lever setting because of the..
  • A
    increasing air density.
  • B
    increasing engine temperature.
  • C
    decreasing air density.
  • D
    decreasing outside air temperature.
Air density decreases with increasing altitude, therefore if the power lever setting remains in the same position during the entire climb the engine RPM will simply start dropping after passing a certain altitude.

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