I've used the Soul 6m and own a 10m Soul and sure they both have a lot of power, but on a surf foil in my experience I don't need or want all that power, I want just enough power and fast turning manoeuvrability. In the lighter end of their wind range both these Souls are very sluggish turning and can easily stall and even fall when gybing on a wave and riding it. There is too much weight in a twin skin foil and inertia of the air within compared to a Peak4 to ever compete in responsiveness.tomtom wrote: ↑Tue Dec 15, 2020 3:32 pmSoul 8 is MUCH more powerfull than Peak 5
FRS 9 is slightly more powerfull static and have quite more peak power than Peak 8
Soul 8 is about same power than FRS 9
all from personal direct experience
FRS is better kite than Peak in 8m+ sizes /for hydrofoil/ in everything except static stability /hang in air/
Twin skin foils don't drift enough and they don't respond quickly at the edge of the window. They also accelerate a little when sheeting out as they hunt for the edge of the window which is not desirable when you want to depower quickly to turn fast enough to avoid running aground in shallow water, avoid an obstacle or to slow down and hold position on a wave.
For me I use a Peak4 size with just enough power to get me up on the foil. Then I can use apparent wind to give me all the power I need to get upwind and foil wherever I want. Any more power is a pain in the arse and just gets in the way of surf foiling. A Peak4 just gets out of the way and hangs about while you foil. I don't want to be dragged around by a powerful kite, I want to use the foil as much as possible.
This puts me in a position between kitefoilers being dragged around by powerful kites and wing foilers who don't like a kite because it's in the way when they're on wave and like the wing as it can trail behind them. The Peak4 gives me the best of both worlds, enough power to use a tiny board and a not too large surf foil, kite gets out of the way when on a wave and I don't have to pump up a wing, (which costs more than a Peak4), and I don't need a larger buoyant board with a larger surf foil which needs more wind.
There seems to be a difference in what people desire from their foiling setup. There are also no doubt a lot of variables apart from the kite with regard to hydrofoils, wind and water conditions, weight, skill and what you like to do. I know I chose to move to an area renowned for its good wind and water conditions 20+ years ago, what a great decision that was