Forklift pulls old soviet style Helicopter

Forklift pulls old soviet style Helicopter - How Sikorsky designed the modern helicopter rotor

All this sounds ingenious—and it is! The person who made it possible was brilliant Russian-born inventor Igor Sikorsky. Here are two of his original helicopter design drawings, taken from the patent for a Direct Lift Aircraft (helicopter) he filed in June 1931: Notice how similar the mechanism is to what we find on a modern helicopter? The patent is extremely detailed and quite complex (you can check it out for yourself), so I've removed most of the labels and numbers and highlighted just a few key features:

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Camera: Sony AX100 Ultra HD 4k

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