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Who was the Russian 12 year old boy who later designed and built a helicopter based on Da Vinci's notebook?
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Who was the Russian 12 year old boy who later designed and built a helicopter based on Da Vinci's notebook?

User Steve Michelotti
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2 Answers

7 votes

Answer:

Igor Sirkorsky

Step-by-step explanation:

User StackFlower
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3 votes

Answer:

igor sikorsky

Step-by-step explanation:

User FBB
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