The flapping of the wings creates eddies that provide the bumblebee with the necessary dynamic lift. Using a super slow-motion camera, Ellington discovered that the bumblebee moves its wings in a circular motion up to 200 times per second, creating a tornado-like vortex of air (tornado effect). This creates a negative pressure and the bumblebee rises into the air. A speed of 20 km/h is no problem for it. In 2012, a small joint was discovered in the middle of the wings, which, like the rest of the wing, consists of the protein resilin. With the joint the wing can be bent. If it was disabled in the experiment, the bumblebees could carry 8.6% less weight.
marginal note: there is no negative pressure, its subpressure to environment. I dont like that.
