Rocker and Rise

Just a short post to log the progress made over the last few days. As discussed in a previous post, the intent is to marry a plan shape and rocker based on the Pan Am with a rise and rail system based on a Phantom 380. So a chunkier looking Pan Am shape. I think this will suit my lighter weight and will also have the aesthetics and high wind performance of a slightly narrower board.

I've been scaling the Phantom 380 rise (rail heights) from one of the images shown in an earlier post and have plotted it here added on to the model of the Phantom 380 rocker, also shown in an earlier post. Because I've scaled the rise by hand from an image, my estimates are a little noisy and so I've done a least squares fit of the data using a 4th order polynomial to provide a smoother representation. Just need to go and check some of the numbers now against a real board to ensure that they look reasonable.

The rise shown here should be the total thickness of the board prior to any rounding at the top of the rails. As such, the functions used to generate this image would then be used to construct a couple of templates which would be pegged to the side of an uncut polystyrene block (see image on the right from Emsworth Custom Boards) which would in turn be hot-wire cut to the template. Of course the functions describing the rise would also have to first be adjusted to account for the thickness of the high density foam outer layer.

Cheers