Rudder Cavitation

Any of you out there ever hear that humming sound when you really get the boat really cooking along? I have a H16 and I think its rudder cavitation. I have EPO rudders, and the trailing edges of them seem a bit thick, and I was considering thinning them down a bit. I was thinking the thick trailing edge would create more drag and turbulent water at trailing edge, and this is whats causing the humming and drag. I'm gonna slap on a fresh coat of epoxy with graphite mixed in...glass fiber was starting to show through, so I sanded them smooth. Thanks in advance for any advice on this!

Yep, the trailing edge always needs some work.

Here is a quick review. Mosly about plastic blades, but works for all rudders and boards.

http://www.hobiecat.com/support/tech/hum.html

_________________
Matt Miller
Former - Director of Parts and Accessory Sales
Warranty and Technical Support
Hobie Cat USA
(Retired 11/7/2022)

Thank You Matt!