This was the proof of concept that Bertin & Cie needed to prove that its hover technology was viable. The company used the BC4 to show how hover vehicles could be easily controlled and were stable.
Tech Xplore on MSN
Engineers develop batlike wings that boost hovering efficiency and flight performance
In 1934, French entomologist Antoine Magnan wrote that bumblebees "should not be able to fly," as their small wings should ...
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