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quicksail

European J 105 Spin Size

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I am wondering what the average J 105 Spin size is on the European boats that do a masthead hoist?  I would assume most would be designed to IRC rating benefits but I would like to know what you guys are using and benefits.

Also has anybody tried to redesign the rudder to a more efficient foil as opposed to the barn door they came with?

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The european normal size is 95 m2

aprox slu 15,8

sle 12,5

shw 8

sfl 7;6

 

the newer boats go for 106-8 m2

slu 16

sle 13

shw 9

sfl 8

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36 minutes ago, quicksail said:

I am wondering what the average J 105 Spin size is on the European boats that do a masthead hoist?  I would assume most would be designed to IRC rating benefits but I would like to know what you guys are using and benefits.

Also has anybody tried to redesign the rudder to a more efficient foil as opposed to the barn door they came with?

We have a custom rudder on ours, although we never met class rules. It is templated on a J/111 design in profile using similar or possibly the same NACA sections. It made a massive difference and the boat is very quick on its feet compared to the old rudder!

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