Air_ray
Hybrid construction with beating wing drive
Screenshots
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Hunter's comment
This stingray was inspired in the real animal.
It uses a servo motor which makes its movement forward and backward. And in the same way up and down.
His skeleton was built in light aluminum. which makes its buoyancy possible.
Also the servomotor and the batteries it uses are extremely light. so that this way has the posibility of having a more maneuverable flight.
In its interior it was filled with helium.
Link
https://www.festo.com/group/en/cms/10245.htm
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Hunter: 
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