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PH15 Building Method Build the outside skin either by simple vacuum bagging, resin infusion or open mold layup. Wait for complete cure. Note that there is no need to cover the Styrofoam parts with fiberglass since we will cut those pieces out. Extend the glass just a few inches over the Styrofoam inserts. Vacuum bag outside skin: Flip over; remove jig, and secure hull: Flip the whole assembly over and support the hull before removing the jig. If you used particleboard to make the molds, use the leftovers as support, they have the perfect shape. Build the inside skin without any floor frames or stringers. Use putty fillets where needed: all seams should have a radius. Use . . . (see building notes for complete text) Now, you have a complete foam sandwich hull shell. Install stringers and floor frames Install the stringers and floor frames in the hull shell. This can be done in one or two steps depending on your vacuum bagging skills and equipment. If you proceed in two steps, install the stringers first. The stringers must be in one piece with the floor frames between them. The stringers are capped with carbon fiber. See the lamination drawing for specifications and stack order. The lamination drawings show how to tab those parts to the hull. We use trapezoidal foam wedges between the framing and the hull. Note how the frames and bulkheads blend in the floor frames. The easiest procedure is to install bulkheads like A and B after the floor frames. Let's look at B for ex- ample. . . (see building notes for complete text) With the stringers and floor frames cured, proceed with the installation of the tunnel. The tunnel fits be- tween the stringers. (see building notes for com- plete text) With the tunnel in place, we install the true transom (motor mount), motor mount sides and sponsoon sides. The true transom and sides do not sit on a foam pad. Build a ?" fillet at the seams with structural putty. Keep in mind that we will cut the tunnel and false transom openings later. There is no tabbing or fillet where we cut. The construction drawing shows the sponsion sides butted against the outside face of the stringers and the motor mount sides on the inside edge of the stringers. Copyright 2016 TwoMorrow Holdings LLCPDF Image | PH15 Building Method Vacuum Bagging
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