Aha Trivia Stuff Everyone Should Know
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Which aircraft became the world's first production helicopter?

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  1. Bell UH-1 Huey
  2. Sikorsky R-4
  3. Boeing CH-47 Chinook

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References

  1. Sikorsky R-4B Hoverfly, National Museum of the United States Air Force www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195868/sikorsky-r-4b-hoverfly Checked 2026-10-10.

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