MJ Sailing · video

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Matt and Jessica align the longeron and forebeam on their homebuilt catamaran by fabricating custom mounting points and refining structural geometry.Watch To ensure proper compression and load distribution, Matt trims 60 millimeters from the longeron, reinforces the forebeam crossing with fiberglass, and rounds over edges near the anchor roller to prevent chafe.1:22 The installation requires precise integration of aluminum brackets that must be bead-blasted and anodized before final bonding.0:26 Because the brackets lack tolerance for post-assembly insertion, Matt de-cores the fiberglass structure to allow the hardware to sit flush.11:20 He determines the final mounting position by manually aligning the pin holes rather than relying on initial geometric calculations.18:18 The assembly includes a martingale, or seagull striker, to prevent the forebeam from inverting under forestay pressure.12:19 Matt also plans to route the anchor chain through a fiberglass tube into the bridge deck to shift weight aft while maintaining watertight integrity.7:15 Precise manual alignment of structural components often proves more accurate than theoretical geometric measurements during custom boat construction.18:13

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