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NordRoi said..
As a spectator I really enjoyed the course slalom, it showed some tactics...reading winds etc.
However, a few rules seemed to not be respected according to Profit while he was broadcasting (read between lines) and then it was clearer on Iachino post. PWA vs Sailing. So I guess in lighter wind they were suppose to use a slalom course over a course racing? I guess it give a big advantage to the lighter sailor and the fittest sailors(rs-x)?
Neither Ben Proffitt nor Iachino had actual wind readings during the races. The race director most certainly
had wind readings.
According to the rules, slalom should be preferred over course racing when the wind drops below 10 knots. The rules don't specify, but that's usually averages - meaning lulls can be below 10 knots.
You also have to keep in mind that the races were done in the mountains, at 1800 m (almost 6000 ft). The air density at this height is about 20% lower than at sea level. That does
not affect wind speed measurements, but it
does affect pressure in the sail. For windsurfing on Lake Silvaplana, you'll need one or two sail sizes bigger than in the same wind at ocean level.
The idea behind switching to slalom is to have fair races
on the foil even in lighter wind. In general, course races are preferred for the medal races because they require more tactics and actual sailing skills than slalom.
During the semifinal where Iachino was eliminated, 7 of the 8 racers (including Iachino) foiled around the entire course on 9 m sails, which is small for foil racing (the formula foilers a week earlier used up to 11 m in more wind). That's a clear indication that the races were fair.
Do light weight racers have an advantage when the wind is lighter? Yes. But that advantage is small, as K?rdel showed by coming in second, and almost winning the finals. Like Iachino, K?rdel comes from PWA slalom. He's definitely heavier than your typical RS:X guy. But if the wind is light, any advantage from lower weight also exists on a slalom course.
Switching from RS:X to foiling has eliminated most of the weight advantage that lighter sailors had. In RS:X, the body type was pretty uniform: tall and skinny. Guys 10 kg heavier than typical did not have much of a chance. That has change.
The bigger difference is not in weight (or fitness), but in specialization and experience. Nicolas Goyard did great because he's a foil specialist. Sebastian K?rdel, who placed 2nd and won many races, also trains a lot on the foil. Kiran, the winner, had to beat the current holder of the Olympic gold medal to qualify for the Olympics. The reason that he beat K?rdel in the finals was obvious: more experience in course racing. When Sebastian thought he had the race because he was in the lead on the last reach, Kiran pumped to increase his speed on the foil. By the time Sebastian caught on and started pumping, too, it was too late. Quite exciting.
In contrast, Iachino's strength in the races were his starts and his speed on downwind legs. Before the start of the semi final, the video shows that he seems to be talking first to the guys in the inflatable, and then to the guys in the starting line boat. It seems like a safe bet that he was demanding a change to slalom, and got angry when they did not change the format. That led to a mediocre start, and his obvious unwillingness to pump as long as the other guys (which was still a whole lot less than what you would have seen in an RS:X race). His attitude and anger management issues seem to have more to do with him missing the finals than the light wind.