Author Topic: Foil minimal speed  (Read 300 times)

fredi

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Foil minimal speed
« on: February 05, 2020, 08:17:00 AM »
Hello
On GPS tracks I can see that I start to fly with my 90cm/2000cm2/tick foil (Gong XL classic) at 6 knots.
Total weight of me+board+foil+weitsuit+wing or paddle is around 85kg (190lbs). It probably vary on sqrt of the weight (if I take the hypothesis that lift if proportional to speed^2), so speed should be similar for lighters or heavier riders.
So I think it's an interesting metric. I have GPS tracks of downwinds, speed measurement of sailing with experimental sails, I've also measured river stream speeds. So I can know if it will work or not with my foil.

Does someone have done measurement of minimum flying speed for other foils that mine? Does the 100cm wide foils can fly at 4 knots?