It seems that most production foils have a flat plate with screw holes for attaching to the board, though some are now mounting with Tuttle boxes. In my mind, the plate style is easier to build strong, and can be attached to a variety of boards. The Tuttle system is simpler, less draggy, but demands higher strength components.
Can anyone verify my assumptions, or further explain the the pros and cons of each approach?
Thanks guys, sounds like a box is the way to go! I am inexperienced with board building, but have a lot of composite design time. Any idea which box is typically used in the current boards (or windsurfers)? Online, I'm finding a $60 composite Waterat, or a $10 plastic Chinook option. Either way I'll embed it in an HD foam and c plate sandwich.
lezo wrote:I have a normal (not deep) Tuttle box on my Spotz foil.
My Spotz foil certainly uses a deep Tuttle. For reference here are pictures comparing the standard Tuttle and deep Tuttle. Obviously the deep one is much stronger and is always used with bigger fins or hydrofoils.
[Edit: There are actually even deeper 'deep Tuttle' fins also. The ones shown below and the Spotz are more a medium deep Tuttle]
tuttle.2.jpg (18.93 KiB) Viewed 1652 times
images.jpg (7.22 KiB) Viewed 1652 times
Last edited by cglazier on Mon Apr 21, 2014 12:20 am, edited 1 time in total.
the only thing I don't like about a deep tuttle is you have to build a race board for it to fit in. You need a 2 1/2" thick board . But I guess for the race boys and girls they want that for the downwind leg of a race.
After I make my first foil with a plate, I will make one with a deep tuttle as well and see which I like better.
You are correct that a board has to be about 2 1/2 inches thick in the middle to accomodate a deep Tuttle box. But most common kite surf boards are over 2 inches thick anyway.
Ease of transportation is a big factor. I can lay my Spotz foil mast flat on my board in my board bag and it adds very little volume. A plate mast is bulky and harder to pack.
I would not make a purchasing decision solely on this issue, I am just predicting that a Tuttle type box will eventually become the norm. It is lighter, smaller, easier to manufacture, and easier for kiters to use.