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Sonic tubes

Posted: Sun Jun 04, 2017 9:42 am
by Robert Biegler
The designer of the Rave V foiling trimaran says that sonic tubes at the junction of V-foils reduce cavitation. See https://www.youtube.com/watch?t=228&v=JD5-shtZalY from 12:30. Does anyone know how these work? When I search for "sonic lifting tube," I only get sites associated with the Rave V, asserting the benefits without explanation of how these things work.