May 12May 12 I have recently bought another IOM with 2 A rigs but the one with a new sail on does not set correctly (from the previous owner) due to too much prebend.We are going to correct this on Wednesday what amount of prebend?The mast is a normal 11mm dia black mast, Graphite sails sail on a Vision IOM.
May 12May 12 Surely the prebend is removed by putting tension on the back stay. If it still doesn’t match the luff curve of the sail then it’s the position of the prebend rather than the amount. The sailmaker should be able to tell you where to put it.
May 13May 13 Author Yes - I removed the sail and measured the current bend 15mm to centre line of the mast, does look to be all in the last 150mm top of the mast.Luckly I also have another A-Rig on my other boat, same sail maker and the sail maker is also from our club so will check with him.Many thanks for replying
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