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post #20 of Old 01-29-2013
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Re: Can someone explain roach to me?


A longer boom does two things. One helpful, one harmful.

First it increases sail area, this is good.

Second it reduces aspect ratio, this is bad.

A good designer must balance these things out when designing the rig. As well as a lot of other stuff like: running backs instead of a backstay, mast weight, mast taper, expected loads, boom length and traveler placement, ect...

Greg Rubin
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