the united states
The first helicopter was made in 1909.
The first Helicopter was made by Igor Sikorsky, in 1939.
No, the first practical helicopter was made in 1941.
The first helicopter produced in Vietnam was the V-24, which was developed in the early 1980s by the Vietnam Helicopter Corporation. The prototype was completed in 1984, marking a significant milestone in Vietnam's aviation industry, as it was the country's first domestically manufactured helicopter.
Igor Sikorsky made the first practical helicopter
Igor Sikorsky made the first practical helicopter
Russia
united states
Sikorsky made the first practical helicopter. Bell followed very soon after
The first practical helicopter built was the Sikorsky VS300, as in pic.
Berlin
They were aluminium