Several years ago we built a balsa composite sandwich wakesurf board. The look is really sweet, although some say it’s got a look like a pergo floor. This is that board.
A close up of the sheets used.
This is a picture of the bottom of the board, you can see the grain and my mixing and matching the pieces, it’s possible to develop a really nice rich and unique look.
This material isn’t as easy to work with as the high density foam we have used in the past, but it offers a number of performance advantages. Balsa is amazingly light in density, but is still of higher density than the high density foam we’ve used. Typically 6 to 7 pounds per cubic foot. Balsa has amazing rebound properties, far better than Corcell, in fact boards manufactured with Balsa skins tend to be called trampolines, because of the pop they create.
The construction has a number of options that will effect the final ride. These options are more varied than with high density foam. One such option is if the skins wrap the rails, or stop before the rails. Wrapping the rails creates a stiffer more rebounding board. One last component is sealing the skin prior to lamination. It’s possible to laminate the skin to the EPS core without sealing it, but sealing it first, can create a uniform depth of resin between the board and core.
We’re testing the stiffness and depth of penetration on a sample of balsa sheet. Many more tests to come!
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