Leonardo da Vinci inventions tested

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Once you start, watch till the end. It’s really good models and video. I did spending a lot of time and energy. Please share, thanks.
Leonardo da Vinci perpetual motion machine and flying machine are included. He is credited with the inventions of the parachute, helicopter and tank, aerial screw, experimental wing, self-supported bridge, double decked bridge, wall defense, anemometer, ball bearing, flywheel, automatic hammer, flying machine, etc. Please watch HD remake of da Vinci inventions with more workable museum quality models.
All models Leonardo da Vinci inventions are made and filmed by the author of this channel.
Leonardo da Vinci inventions tested