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Johan and Malin of RAN Sailing compare the strength-to-weight ratios of various boat-building materials to determine the optimal construction method for their future vessel.0:09 The test subjects include steel, aluminum, Divinycell foam core with fiberglass and epoxy, Western Red Cedar, Douglas fir, and Swedish spruce.1:52 Each sample is cut to a uniform weight of 390 grams.0:26 Testing involves applying incremental weight to the center of each sample until failure or significant deformation occurs.0:27

Western Red Cedar demonstrates the highest strength, supporting 200 kilograms before breaking.19:37 Swedish spruce and Douglas fir both fail at 130 kilograms, offering the best performance-to-price ratio.21:03 The Divinycell composite sample fails at 40 kilograms, which Johan attributes to the lack of vacuum bagging in his manual lamination process.12:12 Steel and aluminum exhibit significant deflection under minimal loads, though they offer superior abrasion resistance compared to wood.2:32 The results confirm the team's decision to pursue a strip-planked hull construction using wood, fiberglass, and epoxy.31:10

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