Leonardo da Vinci inventions tested

Leonardo da Vinci inventions tested, Likes (vs. dislikes) - 98.6% Make it 100! Many thanks!
It's really good models and video. I did spent 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.
Unlocking Leonardo's Engineering: Investigating and Testing da Vinci Inventions
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