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DIY wind vane self steering for sailboat (Mark III)

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This is my third build of a Walt Murray-inspired wind vane. The first one broke at the oar hinge during my sea trial, so this one uses a series of tubes within tubes to increase the lateral strength. This time I also opted for a vertical vane to reduce the number of linkages and account for Home Depot’s limited supplies and my poor mechanical skill. The river was low flow today, hence the lack of oar swinging, but it works fine on a normal day. The vane screws into the PVC tube with a thumb screw to set the heading, and there’s a metal pipe inside the tube to provide strength and something to spin around. This was probably the easiest design yet – let’s all hope it actually works.

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