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New Mast for Robot, how much pre-bend ?

Andrew Start
in IOM

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Looking to re-rig my Robot IOM, does anyone have any detail on the pre bend for the mast, I have emailed Robot Yachts but no reply to date

Thanks in advance 

Andy 

From my research, mast rake should come from the builder, but mast prebend is a function of sail shape, and should come from your sail maker.

Again from my research, many sail makers for IOMs suggest about 14mm of prebend at the tip, extending about 900mm down.

John

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