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Windvanes on Ketches or Yawls
Thanks for the input. I have contacted windvane manufacturers including Cape Horn and they say no problem. The Cape Horn owner even sent photos of his unit mounted on ketches. It appears that the vane can extend over the mizzen boom, and you need to lower the vane when tacking. I am still concerned about the draft off the mizzen sail affecting the performance of the windvane. One ketch owner on the SSCA list indicated that there was such a performance problem on their rig.
Snap - It was a Hinckley B40 yawl that got me into split rigs. It balanced perfectly in various conditions. Wonderful boat! I do not want to sacrifice my mizzen and will continue to seek input from folks with split rigs and windvanes.