Nicko29 said..sheddweller said..sprayblaze said..
The boards look sick, can't wait to try the new quad 9. Why only big sizes in haiku package?- maybe not supposed to be jumped as much...
As for the sails I am a bit skeptical- less monofilm means less reactivity, less skin tension. Apart from the mast- monofilm is the motor of the sail. No matter how durable expensive and sophisticated are laminates, nothing beats monofilm. Otherwise race sails would have abandoned monofilm long time ago for good. The 24/25 wave sails were a good compromise between monofilm/scrim surface area and proper positioning of monofilm with a patch above the longest batten- a very important place for the behavior of the sail. Lets see what the reviews will say. Cheers
What do you mean by "reactivity" ? Power up? Depower? It's a bit vague id like to understand your description more? what characteristic do you think monofilm is giving you that laminates don't? Do you have examples or can you describe the feeling of laminates sails relative to film?
Monofilm is thicker than the 2 thin films of the laminates, therefore it is stiffer. When pressurised it stretches less then is more reactive to gust.
Carbon laminate is even stiffer if the connection (bonding and or sewing) is well made, and only in the direction of the carbon strippes.
I guess this makes it difficult to use properly in slalom sails, that's why Monofilm is still used.
I guess if a sail designer had unlimited time and budget to design the best slalom or speed sail, he would end up using carbon laminate, or even more 3di. But FEA and CFD are expensive and difficult to use properly on a windsurf sail.
Isn't that the point. carbon sails are stiffer in the load directions and allow twist in other directions.. I suspect this is part of the issue north are having.. I mean we are talking single monofilm v 2 layers of monofilm with an interlayer.. the interlayer takes the loads so the external monofilm layers can be thinner providing a lighter stronger matrix.
There is also a lot of marketing going on... the laminate material comes from the factory not the sail designer.. the sail designer figures out if he/she wants to use the material or not.. this is why both simmer and Goya seem to be using the same carbon laminates in their sails from the same factory. It's how the material is implemented that provides differences between sail designs.. also there are other carbon laminate materials out there with different interlayer designs. stiffness in multiple directions.. etc. just it seems too expensive at this time.
Severne who really started this whole thing with their pro models had carbon fibres running in multiple directions and over time have transitioned to similar laminates as simmer and goya. it;s from a different factory and is not the exact same cloth from what I understand. could be wrong..
