Surfboard Fin (with winglets)

by mckoss, published

Surfboard Fin (with winglets) by mckoss Aug 12, 2013
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4077Views 719Downloads Found in Sport & Outdoors


A working surfboard (wake-surf board, in this case) fin. Fitted with mounting tabs for RONIX surfboard.


Early version of this fin broke off due to high side loads. I recommending printing at 100% infill. I also increased the base thickness so that side loads are transferred to the main body of the fin, rather than being all absorbed by the tabs.

Time to print at 100% infill (on Makerbot 2): 6 hours

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I love the design, I'm also rmaking some fin. I would be interested about the kind(s) of plastic you used.
Thank you

Just made with regular old PLA. Printed with 100% in-fill for strength.

I made this and put it on my Airush compact and attempted to kite surf with this fin. It Slowed down the board, felt like surfing in molasses but it made lower speed turns easier than a generic fin. I used it for a couple of hours, but it broke off while using on a wave run. I think it should be made thinner, but great idea!

Jul 30, 2015 - Modified Jul 30, 2015
mckoss - in reply to claytwin

Yes - it is a bit fat - and slowed down my surf board as well. I doubt PLA is strong enough to make a superior alternative to composite fins available commercially. But it's a fun experiment to test the limits of 3D printing.