Steam Engine · World History

What role did the 'flywheel' play in a rotary steam engine?

  1. It smoothed power delivery and kept a constant speed
  2. It was used to steer the engine during transport
  3. It acted as a brake to stop the engine in emergencies
  4. It provided the sparks needed to ignite the steam
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Correct answer: It smoothed power delivery and kept a constant speed

Because a single-cylinder engine provides power in pulses, the heavy flywheel uses inertia to keep the shaft turning between power strokes. This ensures a steady, constant speed necessary for delicate machinery like spinning frames.

Difficulty: Medium Question 17 of 20

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