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snowsurf said..
Thanks for the comprehensive description - and nice video supplement!
I believe that I had more than 2 cm span on my downhaul adjustments during rigging - meaning that I probably ended up way more than -1 cm on the downhaul, but likely not more than -3 on the outhaul. I did feel that I had OK low-end grunt (just wanted a bit more) and it was pretty good when pumping.
I will be more conscious on the centimeters while playing with the adjustments next time.
I was using the Sabfoil W1110 front wing (1180 cm2, 10.4 AR) - great glider, but maybe wanting more speed than the 8kn wind (forecasted with some light gusts). I might have been too optimistic regarding the "planing" limit of the W1110. Will try the W1100 (2100cm2, 5.7 AR) - although risking overpowering that wing with the 7m sail - and the W950 (1350cm2, 6.7 AR).
The larger the wing, the lower the board speed needed for takeoff.
With the Patrik 900 AIO, I need about 14 km/h to lift off, starting from a minimum displacement speed of 6.5 km/h. At that point, acceleration to 25-32 km/h is easy, though short tacks (~500 m) limit top speed (Vmax). Pumping at lower speeds can be intense, but if I reach 7.5 km/h, pumping becomes moderate and possible with a harness. At 8.5 km/h, I can lift off just by leaning forward.
With the SB SuperCruiser and its 1700 cm? wing, lift-off requires at least 5.5 km/h. Around 10 km/h, foiling is achievable, but pumping in light wind can be exhausting and not always effective. The sail must be fully filled with wind, making large pumps necessary. The W1100 wing allows takeoff around 9 km/h but creates significant drag, requiring steady wind and limiting apparent wind generation. Personally, I find the 900 cm? wing easier to manage overall. Pumping is harder and takes 2-3 times longer than with a 1700 cm? wing, especially on a 91 cm wide slalom board, but once airborne, low drag and good apparent wind let me stay foiling longer, even when the wind drops. In contrast, large wings tend to drop quickly without constant wind.
In my opinion, the best setups are:
1. Big front wing (1300-2000 cm?), small sail (5-3 m?), strong and consistent wind (20+ knots) - Great for tricks and maneuverability. Ideal with a smaller board (120-100 L).
2. Small front wing (650-1000 cm?), big sail (9-7 m?), large board (200-160 L) - Best for speed and long-distance cruising. This combo allows for efficient sailing and maintaining high speeds over time.
Mixing setups like a 1700 cm? front wing, 7 m? sail, and a small board (around 115 L) - of course I've tested it - is really tricky.
In light wind, pumping becomes difficult because of small board.
In stronger wind, once the speed goes above 25 km/h, the setup becomes unstable - it's very easy to unintentionally jump out of the water, which makes control harder.
So overall, this kind of mixed setup is not very forgiving and demands a lot from the rider in both light and strong wind conditions.