Sailing SV Delos · video

What this video covers

The construction of a 53-foot aluminum expeditionary catamaran in Brisbane, Australia, utilizes 6mm 5083 H321 aluminum plate for the hull.2:54 This alloy provides high strength, light weight, and natural corrosion resistance through surface oxidation.3:16 Unlike fiberglass, aluminum allows for CAD-designed, CNC-cut components, which simplifies one-off customizations and provides superior impact resistance for high-latitude navigation or shallow-water cruising.5:38 To prevent galvanic corrosion, the build incorporates sacrificial zinc anodes and isolates dissimilar metals, such as stainless steel fasteners, using PTFE pastes like Tefgel or Lanakote.8:39 Because aluminum conducts heat and sound, the design includes interior insulation to manage thermal regulation and noise.10:07 The build process involves welding structural frames, engine grids for a hybrid diesel-electric propulsion system, and 20mm-thick skeg plates to protect the rudders and propellers.17:40 The team maintains structural accuracy within four millimeters over the 16-frame length of the vessel.25:22 Aluminum construction offers high durability and recyclability, though it requires careful management of heat distortion during welding.10:35

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