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A three-blade propeller at 3,200 rpm can strike about how many times in one second?

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  1. About 16
  2. About 1,600
  3. About 160

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References

  1. USCG Boating Safety Division, Engine Cut-Off Switches uscgboating.org/recreational-boaters/engine-cut-off-devices.php Checked 2026-10-08.
  2. USCG Recreational Boating Statistics 2024 (COMDTPUB P16754.38) www.uscgboating.org/library/accident-statistics/Recreational-Boating-Statistics-2024.pdf Checked 2026-10-08.

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