Question: When was the first helicopter made and flown?
qaPairs: question: When was the first transverse twin-rotor helicopter made and successfully flown?
answer: 26 June 1936
question: When was the first manned helicopter made and flown at a height of 2 ft for 1 minute?
answer: 1907
sometime between 14 August and 29 September 1907
question: When was the first truly free helicopter made and flown with a pilot?
answer: 13 November 1907
question: When was the first turbine-powered helicopter made and flown?
answer: 11 December 1951
qaPairs: question: When was the first helicopter made?
answer: 1861
question: When did the first helicopter fly?
answer: 1878