genius

  1. Igor Sikorsky, aviation genius and pioneer, father of the World’s first practical helicopter

    Igor Sikorsky, aviation genius and pioneer, father of the World's first practical helicopter https://youtu.be/kDhdfZ32kEk
    • Dronescapes
    • Thread
    • genius helicopter helicopters igor sikorsky inventor sikorsky
    • Replies: 3
    • Forum: Post-War
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