sciencetoymaker | Human Powered Dragonfly Helicopter @sciencetoymaker | Uploaded December 2015 | Updated October 2024, 2 hours ago.
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Dragonfly Helicopter from Common Materials youtu.be/O77Y2dEvi0s
Make an Easy Dragonfly Helicopter youtu.be/wH6lkmZ8cWs
Make a Dragonfly Helicopter with an adjustable Propeller youtu.be/XjOp9fw3L9w

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