In Stratford, Connecticutt
During WW2.
Nobody, they built it
Igor Sikorski built the first practical helicopter
Igor Sikorski constructed the first successful modern helicopter
Germany
the first plane was built in 1903 the first helicopter was built in 1909
Mad skillz
The first practical helicopter built was the Sikorsky VS300, as in pic.
Igor Sikorsky!:))))
Igor sikorsky
The first operational helicopter was built in 1936, the Focke-Wulf Fw 61.
The very first piloted helicopter was invented by Paul Cornu in 1907, but this design didn't work. Later, a Frenchman Etienne Oehmichen built and flew a helicopter 1 km in 1924. An earlier practical helicopter that flew for a decent amount of space was the "German Focke-Wulf Fw 61."
The first Bell 553 helicopter was officially built in the year 1903 which was specifically researched and made by Bell at high air speeds which was his first experiment.