It's the stiffness that gives it stability thru the water.
There's a lot of swirling inside the wave especially if it's going over reef or the previous waves smashed everywhere. In my videos on Vimeo you can see the 8 inch vertical mast flexing sideways and torquing by about an inch. It shakes back and forth but still feels smooth. I set the camera facing back and down because it was a mystery how the foil behaved underwater.
Enjoyed the FaceTime demonstration of your simple vacuum bagging method.
I look forward to seeing the final glassed foil in this thread.
Swaylocks Surfboard Design Forum: thoughts & theories ... practical & theoretical
RAIL PROFILE http://bgboard.blogspot.com/2014/03/march-82014-afterr-seeing-recent.html
Bill, it was good to do a video showing how to vac bag with a shopping bag. For small items like fins and foils the only cost is the resin and glass.
Looking with a minimalist eye to bodyfoiling, if a single foil can lift the front half of your body out of the water, why not build a double foil setup. It's a front and rear foil connected with a foam topped body. No need for a 'board'.
That an extermely interesting idea.Is the mass/density of your foil low enough that dodging it would not be of great concern if you get caught in the spin cycle?
Getting slammed by a board is a concern any time you go surfing but the foil is like an oversized handplane or minimalist bodyboard. Sometimes I'll go over the falls hugging it and sometimes ditch it and dive but I don't use leashes. I vacbag them so they are generally very light, XPS and 4oz.
I've learnt that if you make a surf item that's very buoyant it'll bounce it's way with the broken wave all the way to the beach.
But if you make it with just slightly positive buoyancy it'll spear into the depths of the wave and while it's working its way to the surface, the waves gone by.
As always, your latest concept has inspired me. Lots of design possibilities.
But my current design/build project has tied up all of my creative time.
May play with this Body Foiling concept next summer (Northern Hemisphere that is).
So it's a sunny spring day, perfect for shaping outdoors in the sun.
EPS on 3 ply.
Stack up a few milk crates to shape on and round out the front hand grab and fair the fuselage into where the foil tips will be.
This is going to look awesome.
We Are One
Thanks for that WAO.
Because it's the 3rd model and I'm somewhat familiar with foiling theory and practical application, I'm keen to expand the designs elements and incorporate styling and a few ideas.
The overall area is 360 sq in with the fuselage being a basic separator creating distance between the front and rear foil. Using the fuselage to my advantage I'm topping it with EPS for buoyancy and torsional rigidity with a layered glass schedule focussed on the middle of the fuselage. Personally I prefer to layer light glass rather than use a single heavy weight as I can build multiple weave directions. All vacced.
The leading foil edge in the previous model was too thick and I could feel that it was slowing the potential speed so I'm thinning the leading edges but moving the foil apex further back in the chord.
And the front hand grip will have rocker under the front edge so that the 'craft' will have inherent lift. Add the buoyancy from the foam and the paddle out should be fairly easy. Maximising the foam volume is also a good perk as you can sit on it in the lineup and be higher in the water for better visibility.
There are a lot of options like internal glassed beams inside the fuselage and staggered foil heights or interchangeble foils but all that can wait for later.
I found out there are people smarter than me already working on their own version of a Body Foil so I'm keen to see what they create.
Generally keeping as much buoyancy in the fuselage and fair it into the thin foils.
Leading edge rounded hand grip and side concave for thumb lock.