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Earn +20 ptsQ: When was the first metal helicopter invented?
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Where was the first helicopter invented and where?
usa
Who was the original inventor of the helicopter?
Igor Sikorsky invented the first practical helicopter.
Who first invented helicopters in 1909?
Nobody invented the helicopter in 1909
Who invented the single rotor helicopter?
Sir Edmund pierce Jacquier first invented the single rotor helicopter in the year 1989.
Which country who invented the first helicopter?
united states
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