Originally Posted by macca
Aside from the fact that One Design goes directly against the F18 guiding principals: "The box measurement rule allows manufacturers to develop catamarans that are competitively priced yet allowing freedom to builders to develop higher levels of performance"

There is the insanely funny part that the Tornado class One Design sail spec as per Ullman sails website shows that they chose 1.5mil laminate to ensure long lasting sails!!! Tornado One Design Sails



http://www.ullmangz.it/products/multihull/tornado-od/

Just check again Andrew cool
Tornado OD sails are using as Material: Apen 6 3.0 mil white from Contender.