Who invented helicopter?

1.	Who invented helicopter?
Answer» ANSWER: Designed by Igor Sikorsky and BUILT by the Vought-Sikorsky Aircraft Division of the UNITED Aircraft Corporation, the helicopter was the first to INCORPORATE a single MAIN rotor and tail rotor design.

Answer»

Designed by Igor Sikorsky and BUILT by the Vought-Sikorsky Aircraft Division of the UNITED Aircraft Corporation, the helicopter was the first to INCORPORATE a single MAIN rotor and tail rotor design.

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Who invented helicopter?​

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Who invented helicopter?