help: set power wind hit to sail

Dear all

i modeling a sailboat about 7m, but i dont know set moment wind hit sail. ? i use Rhinoceros
can you help me?

 

You could try reading Principles of Yacht Design by Larson and Elliason. There is a section detailing how to determive sail and rigging forces.

 

Rhino is a sort of extended pencil with some fancy calculator functions. But it does not make good for sound knowledge of the matter.
'Principles of....' indeed is a good suggestion.
What we do not know yet, is your design's nature and purpose. You may want to rephrase and specify your inquiry a little more in detail.