A helicopter flies using a rotor and can hover whereas an aeroplane has wings and aeroplanes can generally hold a bigger amount of people.
The first helicopter was called the VS-300.
Igor Sikorsky designed the first truly succesful helicopter with the VS-300. The VS-300 went through its flight testst between 1939-1941. The VS-300 became the base model for many helicopters that came after it.
yield vs ytd
.30 vs. .355
What is the difference between a common wealth and a state?
no.
rap vs rock
it was the Sikorsky VS 300
oordbms vs ordbms
b vs. s
ismb vs npb
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