Are the boards assymetric or symetric ?
Symmetric in cross section, and a twist in the lower half..
Mike and I found out that the boat will foil out of the water at 16knts down wind.
It is an unstable system with a positive feedback loop where the foils eventually stall en the whole thing starts all over again. The same thing was happening with the ORMA tris as far back as 5 years ago. That is why foiling moths have a control rod that adjusts the angel of attack of the foil to smaller values when the boat rises too high. The Nacra Freestyle as no such thing and this is the result.
Wouter
It is an unstable system with a positive feedback loop where the foils eventually stall en the whole thing starts all over again. The same thing was happening with the ORMA tris as far back as 5 years ago. That is why foiling moths have a control rod that adjusts the angel of attack of the foil to smaller values when the boat rises too high. The Nacra Freestyle as no such thing and this is the result.
Wouter
It's actually stable when you have your weight placed properly because these are not foils designed to lift the boat clear of the water. As Macca mentioned, in this video they were purposely putting their weight to the rear of the boat to make it leap out of the water when that critical speed (16knots) was obtained.
Yep, the boat is very well behaved when you have your crew weight in the correct location.
Same as any other boat really, you just see a bigger difference on the F20 when you are in the wrong spot. but its not dangerous, just a lot of fun.
Oh, and it still happens on the Orma tri's and another 90ft long tri.... its just how it is!
Have you tried it while wearing a cape? it seemed to work for Jake, but perhaps you need to also carry a plunger at the same time? <img src="<>/smile.gif" alt="smile" title="smile" height="15" width="15" />
Must be a way to control the height rather than crudely pulling boards up and down. As Wouter said above, the moths have this semi-automated with the wand allowing you to control your height. The manual part is setting what level of ride height you want, and you regularly change this based on your speed and wave/wind conditions. Moving weight back/forward was what the mothies did initially when foiling started, but now don't move at all as the systems work.
And this new 20 better be quicker than the old 20! In 15 knots of breeze and flat water on the weekend, it didn't stand a chance against the moth downhill. Motored past it when they thought they were doing full noise...
And this new 20 better be quicker than the old 20! In 15 knots of breeze and flat water on the weekend, it didn't stand a chance against the moth downhill. Motored past it when they thought they were doing full noise...
It's definitely faster than the N20 and by a fairly substantial margin.
Good, will have something to chase when they arrive in Singapore.