Give humanity a few centuries, and someone will work out how to build any contraption you can dream up. Leonardo Da Vinci drew blueprints for a partially-functional helicopter hundreds of years before one was actually built, and the physics behind the modern chopper would make even the great inventor?s head spin. Lucky for you there?s [...]
Source: http://www.geek.com/articles/geek-cetera/video-series-teaches-us-how-helicopters-work-20120324/
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