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replace fair use with public domain img
[[Image:ADV0300.jpg|right]]
[[Image:Sea_King.jpg|right|thumb|300px|Westland ''Sea King'' helicopter of 845 Naval Air Squadron, [[Royal Navy]] ([[Serbia]], 1997)]]
A '''helicopter''' is a rotary wing [[aircraft]]. The first practical helicopter was developed in 1939 by [[Russian]]-born [[Igor Sikorsky]] (1889–1972).
A '''helicopter''' is a rotary wing [[aircraft]]. The first practical helicopter was developed in 1939 by [[Russian]]-born [[Igor Sikorsky]] (1889–1972).