Sunday, September 27, 2009

So you want to make a surfboard post 4

There are important points in the shape of a surfboard that are sometimes overlooked in the process of actually shaping a board buy the inexperienced. But if you start with a decent blank the end result will be something that will work good enough. And, since the close of Clark Foam the blank choices are better.

I’ve personally gravitated to just a couple blank companies because my needs are met with them and there is no need to look further. Most of the plugs that are used to make the molds that blanks are made from at the new blank companies are better because they were machined. This means they have even foam distribution and are free from uneven spots often found in the molds of the past. An important item for the beginning craftsmen because shaping a surfboard without lumps and bumps is hard enough. If you have to clean up an uneven blank before starting your shape job… will it does make the process more difficult.

So if you start your shape job by outlining the blank or skinning and milling the blank to thickness is not important. What is important is getting a good outline on your blank. It should have an even curve with out flat spots, unless the flat areas are intended like might be seen in the tail area of some with soft wings.

The way to get a good outline is to start with a good template. Taking great care and time in getting your outline clean and without flaw is the first step in getting your blank outlined well. Once you’ve got your template perfect lay it on your blank and scribe the template outline with a soft lead pencil… a nice neat line. Then cut to that line with a saw leaving just enough foam outside the line to clean up with a sanding block so all you see is the pencil line with no flat spots at anyplace on the blank.

Rule number one in the shaping process is.. no flat spots in the outline. If you have flat spots in your outline when you band and screen in your rails later the flats spot will reflect onto the deck in the form of low spots. So not only will you have a flat spot in your outline but you will also have a low area in the deck crown.

Assuming the blank has the rocker you want in it, after you’ve got the outline dialed you can cut the blank to thickness and then band the rails. As well, if you’ve got a blank that is close to the size board you are making getting to thickness and banding in the rails is a pretty straight forward process with a planer or hand plane.

When you’ve gotten to the final stages of sanding and screening the next important thing is making sure the stringer has a neat clean curve to it…. No flat areas.

Rule number two in the shaping process is… no flat spots in the stringer curve on the deck or bottom of the board. Because the stringer is wood and harder than foam if you have a lump or bump in the stringer it will leave the outlying area of foam with a lump or bump too.

So basically shaping comes down to good outlines and good deck curves and bottom curves. If you look at any of your favorite boards that’s most likely what you will see.

D.R.


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