Fish swim forming vortex rings. To propel their body, they create vortex rings that go behind, obeying to action-to-reaction law. Researches show that birds, gerridae, do the same…Amazing! Do we the same on the ground?…
http://rspb.royalsocietypublishing.org/content/271/1539/647.full.pdf+html
Fish, birds and airplanes propel forming vortex rings
02 Sunday Mar 2014
Posted Propulsion, Science, Vortex rings
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