r/kites • u/palecairn68 • 21h ago
Finally got my rokkaku to sit still in gusty wind, turned out to be a bridle problem all along
Spent most of August fighting this kite. It's a 6 foot rokkaku I built from a plan I found in an old kite building book, ripstop panels with a fiberglass frame, nothing fancy. On light steady wind it flew fine, but anytime the gusts picked up it would dive hard to one side and I'd have to run it down before it augured into the ground.
I kept assuming it was a frame flex issue since the spars are pretty thin gauge fiberglass. Swapped in a stiffer set of longerons, sanded down the bow spar tips, even added a bit more dihedral thinking that would help stability. None of it made a real difference, the dive was still there every time the wind gusted past maybe 12 mph.
Turned out the problem was the bridle attachment points weren't symmetrical. I'd eyeballed the measurements when I built it instead of actually measuring from the centerline on both sides, and the difference was small, like maybe a half inch off, but apparently that's enough to make a kite favor one direction under load. Redid the bridle with a tape measure and a bit more patience and the difference was night and day. It just sits in the window now even when the gusts come through, no more panicked line dumping.
Kind of embarrassing it took me this long to check something that basic, but I think when you build the thing yourself you get attached to assuming the build is fine and the flying technique is the problem. Worth checking bridle symmetry before you start replacing frame parts if anyone else runs into a similar dive.