What's the nubbin on your board?

I get asked this one quite a bit - so here is the explanation.
Go google anti-cavitation plate. You'll find them on all outboard engines.
The first ever session I had on the FD I didn't bother securing the cable and was horrified at how much the prop cavities - it was almost unusable.
Then I taped it and it was much better but still noisy and needed to be buried if you were expecting max thrust..
So then I did some research and this was the result.
Made with 2 thin sheets of G10, a carbon plate and some epoxy :-)
marginal gain, but worth keeping!

[@laurencesapille615]

This anti-cavitation would be more efficient, being btw the propeller and the foil, imo, since the propeller generates a real cavitation.
-
The air surface interaction is a ventilation, nope a cavitation, but being more downward, it could stop it too as well..

[@ktwo-surf]

Very true on the definitions, but it's air on the prop either way and stopping as much as you can makes it quieter and more efficient. It's not a massive difference, but it all helps, and I hate the noise it makes.. like a nice quiet ride :-)

[@Joshcodes808]

Very cool. I’m thinking of printing up a new motor mount now that has the plate built in and covers the wire custom to my preferred mast.