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German glider pioneer Otto Lilienthal helped the Wright brothers in what way?

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  1. He taught them to fly in Germany
  2. He sold them their first engine
  3. His book on aerodynamics guided their designs

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References

  1. NASA Glenn: History of Flight www.grc.nasa.gov/www/k-12/UEET/StudentSite/historyofflight.html Checked 2026-10-10.

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