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ADinis said..
Freeride board I think they go earlier than slalom
True when (a) sailing passively, and (b) comparing similar sized freeride gear (board
and sail) with slalom gear, or (c) when the sailor does not have good skills (e.g. has problems to get into the outboard straps on slalom gear). The current issue of the German "Surf" magazine has an article comparing freeride, freerace, and slalom gear (Tabou Rocket with no-cam Matrix, Rocket+ with cammed Cosmic, and Manta with 4-cam Vapor), and say that the comparison did not work at all
without pumping because the freeride and freerace boards started planing long before the slalom board. The slalom board and slalom sail needed "very energetic pumping" to get going.
Part of the problem in the test was that they compared identical size sails. On slalom gear, I will generally use a sail 1-2 sizes bigger than on freeride gear, and I think that's pretty typical. Slalom gear is easier to sail with plenty of power, and the slalom sails are so stable that getting overpowered is rarely an issue.
That said, there are of course large differences in freeride boards. My favorite board for freeriding is a Fanatic Skate 110, which is actually a freestyle board. It has the same flat rocker and high rails as a slalom board to get going very quickly, but inboard footstraps. I can get this board planing a lot more easily than my slalom boards or many typical FSW boards. In the Surf test, the freeride board they used was the Rocket, which is known to not just plane earlier than other similar sized freeride boards, but also to be very good at getting going "passively", without pumping.
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ADinis said..
can freeride sails planning earlier than slalom sails??
Yes (but). Slalom sails have a lot more loose leech, which pretty much reduces their effective size when trying to get going in marginal conditions. Freeride sails are also easier to pump for windsurfers with typical skill sets. If you can pump a slalom sail energetically and effectively, then the difference may disappear.
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ADinis said..
the cambers can help me passing through the lulls, my homespot has a lot!! But can a freeride sail with 1 or 2 cambers do the same?? It can make the shape of the sail anyway?
True, a cambered sail will hold its shape in lulls, and help you to keep planing. That is indeed true for a freerace sail with 2 or 3 cambers.
The biggest differences between slalom and freeride sails are in wind range and handling. The larger wind range of a properly trimmed slalom sail means you can use a larger sail, which
may help you get planing in less wind. But slalom sails are heavier, which is only compounded if you use larger sail. They are harder to handle in jibes, requiring better technique. If you crash on a regular basis, using a slalom sail is not a great idea. If the wide mast sleeve fills up with water, slalom sails are
very hard to waterstart or uphaul. But if you are lucky enough to sail in shallow water, that's not an issue.
Overall, it seems you want to plane earlier in lighter wind, and plane through frequent lulls better. Without knowing more about your jibe success rate, fitness, and so on, it seems that a freerace sail with 2 or 3 cams may be your best bet. It's probably a bit more stable than no-cam sails, so you can use a sail size larger, and has a narrower mast sleeve than full slalom sails, which makes water starting and uphauling easier. But these are, or course, only general rules. I personally don't follow them - I'll stick with easy freeride of freestyle sails for bump and jump, and slalom sails for shallow water and speed.