A helicopter was a type of aircraft that achieved flight by use of a rotating wing.
In 1986, Plexicorp owned a helicopter which could be used for hauling sheets of plexiglass. (Star Trek IV: The Voyage Home)
The National Guard employed helicopters during their siege on the San Francisco Sanctuary District's in 2024. (DS9: "Past Tense, Part II")
Mona Luvsitt, a character in the holosuite program Julian Bashir, Secret Agent, was an accomplished helicopter pilot. (DS9: "Our Man Bashir")
Sulu claimed to have flown "something similar" to the Huey 204 in his academy days, suggesting that helicopters might still be around in some form in the 23rd century.
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