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gibbo000001 said..
Is it possible to have a windsurfer and just cruise at low speeds? Is that a thing people do, kind of like sailing a bit as slow speeds, instead of going Mach 10 all the time? Is this a thing?
Yeah Windsurfer LT is a modern version of this. There are also some more planing optimized longboards i.e. kona one which plane faster.
There are parts of the world where this is very popular, usually in lighter wind areas. I see a fair few in Australia and I only ride longboards and I don't really have much desire to ride a shortboard.
Sub 6 knots of wind it feels like standing on an autopropelling SUP.
Above 8 knots it's a sensation more akin to sailing as the board operates in displacement mode with the oldschool yachtsail swaying in the wind a bit when nicely locked in. Above 12 knots of wind the nose starts lifting out of the water and you reach humpspeed where the board gradually transitions to planing and >15 knots you plane all the time but you are slower than on a shortboard (though it feels very fast). The sweetspot is 10-18 knots of variable wind where foilers are at risk of getting yanked off their foils and shortboards cant reliably plane.
Today when I started it was blowing 10-12 knots so I was capped at displacement speed of ~10km/h. 8 - 12 knots of wind doesn't really make much difference to the speed but it's easier to hang off the harnesslines in more wind and you can reach more upwind. There were some wingfoilers out, a windfoiler and a couple of shortboarders. The shortboarders were probably capped to 5-6km/h or so? I felt like I was going about twice as fast as them. The wingfoilers I reckon went around 50% faster than me so maybe 15km/h?. An hour later the wind picked up to 15 knots - great for the shortboarders. Between 12 and 15 knots of wind you do this weird thing where you skim between hump and displacement speed all the time so you see variable speeds between 10-15 km/h with 15km/h being the cap. After 15km/h the board always planes and jumps straight to 20km/h for me. I got up to hump and then plane speed and was probably similar speed to the foilers. Then it picked up to 20 knots. The wingfoilers got yanked and had to go back home and I think the 2 shortboarders were still going but overpowered. Not sure what happened to the windfoiler.
Paradoxically I find the planing treshold isn't really that different from normal all purpose shortboards and with a modern planing-sail as opposed to vintage rig it's probably below that of a shortboard. I presume this is from the large lenght dependent surface area. Once you get planing though your speed doesn't really increase much with increasing wind unlike on a shortboard....
One thing you see longborders do all the time is to go touring i.e. move from one beach to another, often because they spot another longborder (if they use a vintage style sail) on the horizon or just because they can. The daggerboard and waterline lenght means ultimately it doesnt matter if its 3 knots or 25 knots. you can always get home. And if something aweful happens you just go SUPing.