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The first ever person to make blueprints for the helicopter was Leonardo da Vinci. He called it the aerial screw. -
The VS-300 helicopter made by Igor Sikorsky was the first ever helicopter that was practical and functions like they do in the modern day and age -
The YR-4B was the first ever helicopter to fly in combat -
The first ever two rotor helicopter was called the Chinook and it was built by a man named Frank Nicolas Piasecki. -
The first ever helicopter pad was created to make it easier to land a helicopter.
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The Robinson helicopter company is one of the cheapest helicopter manufactures in the world and as long as you have a little bit of money and a helicopter license it is very easy to get one but of coarse their is a catch for these helicopters being so cheap and that is that these helicopters are more prone to crashes than other more expensive helicopter. In the years 2006-2016 the Robinson company's helicopters have caused at least 42 deadly crashes
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The SikorSky was the first ever fully electric helicopter ever -
The ingenuity was a small robotic helicopter that hovered over mars for a minute or two for NASA testing