3.73kn differential seems negligible, what % of this difference can be attributed to wind speed differences? What was the wind speed difference between Rob's last performance vs Sail Rocket? It would seem that 6% difference could be due to wind differences? Certainly finetuning the kite rig/setup is in order..pluvious2002 wrote:i am not a scientist, so i don't know squat about aero or hydro dynamics, but one element that i haven't heard anybody mention is the sail rockets curved 'foil', which is one of the only two parts of the boat in the water at speed (the other being a small skeg or rudder beneath the front right float. ) my instincts tell me that one of the keys for faster speed on a kiteboard will be to incorporate some version of that foil, eliminating all drag from the flat surface of the kiteboard. whether this would work or not, i don't know, but a sub surface foil, working in opposition to the kite, might eliminate drag, and recoup some of the speed wasted by leaning against the kite. is idea retarded? i know that the 'righting moment' on the sail rocket is neglible, or non existant, puttting the forces in balance so that wind, and, more importantly, apparent wind, can be converted to forward motion. why not put those forces in balance on a kiteboard w/foil extending to windward?
Sailrocket's best is 65.45 knots for the 500m set in about 30 knots of wind.polarstorm wrote:3.73kn differential seems negligible, what % of this difference can be attributed to wind speed differences? What was the wind speed difference between Rob's last performance vs Sail Rocket? It would seem that 6% difference could be due to wind differences? Certainly finetuning the kite rig/setup is in order..pluvious2002 wrote:i am not a scientist, so i don't know squat about aero or hydro dynamics, but one element that i haven't heard anybody mention is the sail rockets curved 'foil', which is one of the only two parts of the boat in the water at speed (the other being a small skeg or rudder beneath the front right float. ) my instincts tell me that one of the keys for faster speed on a kiteboard will be to incorporate some version of that foil, eliminating all drag from the flat surface of the kiteboard. whether this would work or not, i don't know, but a sub surface foil, working in opposition to the kite, might eliminate drag, and recoup some of the speed wasted by leaning against the kite. is idea retarded? i know that the 'righting moment' on the sail rocket is neglible, or non existant, puttting the forces in balance so that wind, and, more importantly, apparent wind, can be converted to forward motion. why not put those forces in balance on a kiteboard w/foil extending to windward?
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