Jyoder wrote: ↑Sun Feb 03, 2019 2:47 amPF, An interesting concept I learned flying hang gliders is that the angle of attack of a glider wing for maximum lift and slowest descent isn’t the same as the angle of attack for best glide distance (ie. efficiency).
Beyond adjusting the thickness, camber, and aspect ratio of a hydrofoil wing, I imagine adjusting angle of attack of wing/stab ratio with shims can make a foil more or less tuned toward glide vs lift. For wave foiling, I imagine you want high AoA when on wave face but a more efficient AoA when carving and bleeding off the energy you gained from the wave. Unfortunately, we have yet to see a foil that you can change wing/stab AoA relation on the fly. What if we had a foot switch that adjusted stabilizer or wing AoA between “slow-lift” and “fast-glide” settings.
Another variable geometry solution is changing aspect ratio of the wing, such as hang glider VG setting, or the military fighter jets with this ability. Doubt that would be easy to manage on a submersed foil wing, however. Food for thought.
plummet wrote: ↑Tue Feb 05, 2019 10:42 pmI had a look at some wings the other day with the other lone foiler at my area. Sup wings are pretty darn thick. Like 40mm profile. The surd wing for small waves was around 30mm. The wing hw liked the most for larger waves was an adapted hover glide wing around 22mm thick and maybe 650 cm3. My wing max profile thickness is 17mm thick which explains the fast acceleration and difficulty shedding speed on the bigger waves.
I'm thinking i need to get up to 22mm max thickness then role a hydrofoil profile with some anhedral and some token winglets In the 600-700 cm3 range.
Care to measure the max profile thickness of some of your wings Peter?
Users browsing this forum: Flyboy and 7 guests