"... The underwater dolphin kick attracted the interest of swimming innovators as early as the 1930s. The late Volney C. Wilson explored its possibilities before diving into later work on nuclear fission and the atomic bomb, according to David Schrader, a research professor at Marquette University who is Wilson's biographer.
Schrader said Wilson, an alternate on the 1932 Olympic water polo team who studied fish propulsion at a Chicago aquarium, claimed to have shown the kick to Johnny Weissmuller, a training mate at the Illinois Athletic Club. ..."
I think Weissmuller would have been way more receptive to it if the flip-turn was part of a swimmer's lexicon.
There are so many gems in this article regarding swimmers Misty Hyman; Neil Walker; local boy, Lenny Krayzelburg; Michael Phelps; and they even bring in propeller heads from the Navy into George Washinton University to study its effectiveness. It is a total must read: [Link]
Thanks for sending this ;-)