Forces on sails (3 m) = 5-m/s (≈10-knot) wind at 3 m above the water would be approximately "V" (15 m) = 6 m/s (≈12 knots) at 15 m above the water. In hurricane-force winds with "V" (3 m) = 40-m/s (≈78 knots) the speed at 15 m would be "V" (15 m) = 49 m/s (≈95 knots) with "p" = 0.128. This suggests that sails that reach higher above the surface can be subject to stronger wind forces that move the centre of effort ("CE" ) higher above the surface and increase the heeling moment. Additionally, apparent wind direction moves aft with
Sporting-Sails Nick and Billy Smith tested the drogue parachute/wingsuit flying-like device on skis before attempting to try on a skateboard in the hills surrounding the Marin Headlands and San Francisco, California. On a skateboard, creating drag at will by deploying the Sporting-Sail during the descent enabled Nick and Billy Smith to control their speed and stability on steeper terrain. For many years Sporting-Sails was based in Ventura, California, close-by to Patagonia (clothing) HQ, where Billy Smith currently works full-time as their wetsuit developer. Currently, Sporting-Sails HQ's are back in the shadows of Mt. Tamalpais in Mill Valley, California. The Sporting-Sail logo