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Непрочитано 24.06.2018, 21:20
#19
SERGEICH
Windsurfer

Аватар для SERGEICH
 
Club: Отшельник
Location: СПБ
Weight: 72 kg.
Цитата:
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А мне нравится, получился парус с очень большим отношением высота к ширине (aspect ratio), что значит этот парус должен быть очень быстрый на передозах. Если где есть результаты тестов, я б почитал.
DAVID EZZY DOES NOT BELIEVE IN FADS !!!


Like all Ezzy sails, the Hydra is born from David’s passion and attention to detail. The first thing that David noticed about foiling is that it opens up a whole new challenge for sail design. The fundamentals of foiling are simply different than normal windsurfing, which is why the Hydra looks nothing like a normal windsurfing sail.

First off, because the foil can fly through the water with so little drag, the wind angles are different, which means that the apparent wind (the wind created by your movement) shifts forward. Second, you need a powerful sail to pump up onto the foil, but once you’re on the foil, you want a very easy to control, light sail. And third, you’re above the surface of the water when you’re flying on the foil.

The elongated foot on the Hydra takes advantage of the board’s height off the water to create a hyper efficient sail. On a normal windsurfing sail, a long foot like this would hit the water when cruising and simply not work, but when foiling, we can take advantage of this “free” space created by flying above the water. The extra long foot forms an end-plate with the board. This is very similar to how winglets work on a jet wing, and aerodynamic theory tells us that an end-plate like this greatly improves the efficiency of the sail. For example, David can ride a 4.0 in conditions he would normally ride a 6.5.
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