This is a bit misleading. Naturally standard cloth is not optimal neither in light wind nor marginal winds but "limited camber" is never an explanation for efficiency - it is good for stability though.Regis-de-giens wrote: in its current setting (standard cloth and probably limited camber), it is efficient in light wind but not the optimum for marginal winds
Well, I understand your thoughts by how you write them down.Regis-de-giens wrote: ↑Mon Feb 04, 2019 4:44 pmBy efficiency I mean ability/facility to ride, not vmg or upwind angle or race matters (*) ; do not want to pollute this thread with camber again, I said just one word to present my humble suggestion; now I need to detail since I think you misunderstood my thoughts ...
More camber indeed gives more lift or pull and it gives it in both "first foil-up" and upwind. But if kite has more drag than usual upwind performance can suffer even if it has good lift. It is two different things to get going from practically zero speed than to push upwind with high apparent wind speed. Low weight (and inertia) of Pulsion helps in the start, it has better acceleration and therefore it reaches higher speed in the loop giving more power. It may also have more camber and higher lowest AoA but if it is so it sacrifices stability or depower or both.Regis-de-giens wrote: ↑Mon Feb 04, 2019 4:44 pm- camber goes in favor of power (line pure traction) which is useful in marginal wind to get out of water; upwind ability has no sense if you have not enough pull to first foil-up (while you can have good fun in waves or transitions even without high upwind angle)
You agree what I wrote? I don't agree that "limited camber" is explanation for efficiency in light winds. I just wanted to correct this because quite many have strange or even false opinions on how camber, mixer adjustment, trimmer position/bar position affect on kite performance. Some opinions are exactly opposite from reality.
I watched your video with FRS and I must say it didn't behave well. Collapse was severe and in my opinion unacceptable for a modern foil kite. This suggests camber of the kite is not low and stability of it isn't very good. Because I know you are skilled and experienced kiter I assume you did what was possible to avoid it. After that incident reading quite positive feedback of yours was a bit puzzling - or is it good enough with FRS to survive back to the shore? OK, it did relaunch finally and was able to stay relaunchable for quite a long time.Regis-de-giens wrote: Camber value is not a judgment ; it is a design choice with pro and cons as usual ; looking at the FRS design and trying to understand the reason of its lower loop power vs Pulsion for example, the main cause I expect is camber being flatter (pure personal analysis , having no access to the core design), hence my suggestion to add some setting knots to extend kite use on next generations (I know you do not like that, sorry but I experimented its useful impact and Flysurfer even published dedicated tutorials on this).
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