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Raceboat Cockpit
Construction Notes
Page One
molds and Setup

The four forward-most molds have a simple rounded top.

The molds can be drawn directly on plywood, starting with a vertical centerline and a baseline (bottom of the mold) exactly at right angles to the centerline.

Measure to left and right the width of the mold, and then draw those lines.

Measure up the centerline the overall height of the mold. Then measure down from that point an amount equal to the radius of the mold's curve. Draw the curve with a compass or similar tool.

molds #5 and #6 form the portion of the cockpit that is behind the driver, including the "halo" behind the driver's head.

If you are building a low cockpit, these two molds can be left square on top, and don't need to be quite as tall as indicated in the drawings -- really only up to the "crease" where the raised side pieces would begin. The exact height will likey have to be determined once you start fitting the cockpit to your boat.

Set up the molds on a jig made from a pair of 2x4s or similar timbers. A 2x2 or 1x1 at the base of each mold serves to attach them to the jig.

Mount molds #1-#4 aft of their Sta (Station) lines. Mount #5 and #6 forward of their Sta lines.

Make certain the molds are perfectly lined up along their centerlines, and square to the centerline of the jig.

Molds #3 and #4 are close together because: #4 is the forward-most mold before the width of the cockpit begins to narrow; and #3 is situated at the forward extremity of the cockpit opening.

For the plans, I re-drew mold #2 and moved it forward to put it midway between #1 and #3, so your setup will look a little different from mine.

I used 1/4"-thick battens when building my cockpit, but they proved too flexible.

I recommend using 1/2" thick battens. Thicker battens will produce a slightly larger cockpit overall.

I backed up mold #1 with a piece of 3/4" lumber, beveled to the angle of the battens.

I tapered the battens so they could be crowded onto this very small mold.

For those building a tall, Sport C-type cockpit, these battens form the raised areas which afford head protection for the driver.

The form with all its battens.

The two battens lying edge-to-edge form the "crease" at the base of the side extensions.

Look closely and you can see where the eventual shape of these side pieces has been sketched onto the battens.

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