I want to discuss proper wave foiling and the limits of using a kite
A thread on this would be good, piece by piece the puzzle is coming together for me. Needless to say hydrofoils are well at home in waves
On larger wave days, I have had my 3 meter P4 completely slack line and fall out of the sky a couple of times. Interested to learn how others avoid this.
You can't avoid slack lines when you exceed or approach close to wind speed. You can fly a kite to reduce the speed it needs to fly. You can fly it in reverse if you manage to go fast enough beyond wind speed, more something for under 10knots. If you do slack the lines then the kite directly at 12 o'clock/middle I would assume like with a double skin is best so the kite is balanced and will distort less. I often backstall or oversheet when slacking lines. Use oversheeting to recover the kite too, so is less likely to play up.
Trent hink wrote:
Everywhere I've been to, the available power from the wind is proportional to the velocity squared.
I have often wondered if this is exactly true for kites. Because kites can move through the air faster, they will not always be seeing the same exact speed as the wind. I have noticed that the speed a kite can move through the air does not exactly scale as you would think with the wind speed. So say the speed in 10knots is not far off the speed in 20knots. Someone could and probably has done the measurements for peak pull from a kite in differing wind speeds. I think it is interesting. The design of the wing would be a large factor. Thinner airfoils would have the most speed in a bigger variety of wind speeds. I have noticed that bigger fatter kites seem to max out, or as wind speed passes a point the kites really don't seem to go much faster. The airfoil reaches it's limit. Like larger and thicker hydrofoils have lower speed limits.
Windspeed for a kite moving through the window can be looked as sink rate for planes, gliders, etc. This is why kites can still be flown around down to 1-3knots but not static flown in that wind.
There are limits for true waveriding with kite and direct downwind speed > than actual wind speed is one of them.
It depends what you call "wave" riding. Using the wave you can exceed the wind speed and have slack lines or you can exceed it more and continue flying the kite, like riding in offshore wind. Generally if you are driving more pull into the kite you need more wave power to overcome it. To feel more free on the wave like that a smaller kite with more depower is better. For slack lines the size of the kite doesn't matter, except bigger ones hold shape better and fall more slow.
Bigger wings like moses 790 are really pump-able and slower.
Even bigger than that is even better for pumping. That is a good size I think for many waves though. Stefs friend uses about that size.
You can deal with too much lift by moving yourself physically forward /strapless/ while down the line /this is Gunnars tip/
Of course, the problem is though the bigger the wing the earlier it maxes out speed, which means you can't ride some faster waves or have trouble moving along the face, can't make as many turns etc. Going slower and having more lift makes slower and smaller waves easier to stay on. If you want to slow down though you can ride more in front of the wave at the base. Mind you it gets very shallow on that part of the wave... the number of times I have eaten shit there.
Imagine small weak drone - just to hold peak above you with autopilot software for just that - otherwise kite carry drone = no power spend...
There is many things, maybe not practical for now but in the future. The simple thing I would like to see is dihedral kites so they drift really good on slack lines. An aluula diherdral tube kite would likely blow minds surfing.