Manufacturer - Festo AG & Co. KG
festo.com/net/SupportPortal/Files/42054/Air_ray_en.pdf
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https://youtu.be/c3-wIICjAhE
Uploaded on Nov 16, 2010
Quote:
Hybrid construction with beating wing drive
Made possible by its lightweight design and the lift provided by helium, the Air_ray "swims" in a sea of air like a manta ray in water.