Mast Rake

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Postby Guest » Mon Feb 20, 2006 10:13 pm

Now that the class rules do not restrict the maximum heatstay length, is there any thoughts on advantages/disadvantages to increasing mast rake. Increasing rake will increase weather helm. I am sure there are multiple considerations that may require the lead of the sail designers.
Terry Burke
TopNotch #405

Postby Guest » Tue Feb 21, 2006 11:53 am

It will all depend on how your sails are cut, the more you rack the mast the less pre bend you will be able to exert to your mast. So, the people with more rack will need slightly flater sails since you will not be able to aply the same amount of pre bend as more straight up and down masts. The more rack you have the more overlap you will have between the Main and Jib thus creating a deeper slot which may give you more power in the heavy winds (weather helm will result due to rack and keel position - other factors to be aware of) but you may be a little depowered in the light stuff if you have to much rack, since racking is a form of depowering. I believe the good guys will adjust the forstay from race to race just as they would their side stays.

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