DUDLEY DIX YACHT DESIGN

Building the DH550 Catamaran

Page 1 - Bulkheads & Stringers

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DH550 radius chine plywood catamaran

Bulkheads set up on legs and braced. If building on a soil base then conventional building stocks should be built to support the bulkhead legs.

Building off building stocks makes it easier to accurately position and align the bulkheads and to brace them firmly.

DH550 radius chine plywood catamaran

DH550 radius chine plywood catamaran

Adding the plywood backbone. Phil has fitted the backbone in sections between the bulkheads. My recommended method is to slot the backbone egg-crate fashion into the bulkheads. This helps with correcting any misalignment errors and keeps the structure more rigid before doing the epoxy fillets.

DH550 radius chine plywood catamaran

Stringers slotted into bulkheads and epoxied.

The tangent doublers (wider stringer in photo) have also been fitted and will form the surface on which the junction between flat and curved plywood will take place.

DH550 radius chine plywood catamaran

The plywood stem piece is epoxied to the front of the forward bulkhead. The stringers are bevelled on the inner face to lie flat against the stem and are epoxied to it.

DH550 radius chine plywood catamaran

Aft view of bulkheads and stringers. The aft frame is temporary to define the aft shape of the hull.

Major bulkheads are continuous across the boat. The last bulkhead in the photo is one of these and projects outside the hull for later extension onto the bridgedeck. The stringers are continuous, so they pass through holes cut into the bulkhead.

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This page was updated 18 May 2005

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