Coanda Channel Technology

If anything, I’d probably do 8x23x2.75 or 3". Simple 50/50 rails. Concave in front third. Flat to belly in second third and then flat in tail.

Would need width at different length intervals to find a good location.

I’m really interested in following this one, it’s an interesting design.

7" tail x 16" tail (@12")x 23 mid x 15 nose

What would your max tail rocker normally be?

I’m open to suggestions. I’m sure I can shape it into the channel, whatever it needs to be.

I’m designing a Channel Fish this summer. Retro Fish planshape but using a channel in place of a butt crack. Since the channel exit is at tail’s end, channel depth is easier for me to calculate. I use channel depth to calculate channel length.

However, I’m no pro at determining ideal tail rocker. Positioning the channel exit in front of tail’s end makes channel depth and length estmates a bit more challenging. So knowing your preferred tail rocker without a channel would give me some place to start for determining channel depth and length.

Basically, for a longer board, I would position the channel exit(s) near the tail where the board is from 12”-18” wide. For a single channel, I would locate channel exit closer to 12” wide. For a twin channel, I would locate channel exits closer 18” wide.

Found this rocker guide at Greenlight Surf Supply:

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