Magic of the tubercles on humpback whales flippers

The ability to make such rapid and tight turns is unique among whales and is associated with two facts. First, the humpback whale has the longest flipper of any cetacean (a family of fish composed of whales, dolphins, and 

In Germany, the DLR Institute of Aerodynamics and Flow Technology has been involved in research on the impact of tubercles on the performance of helicopter blades. In fact, the research has already resulted in a patent on Leading-Edge Vortex Generators, and the invention has been used to design and build various experimental helicopter blades, which are undergoing tests. If all the results of these tests are positive, as it is expected, a 

---