Check for knots/shrinkage in the bridle, especially on the A level. I've had this happen before in the higher side of the wind range and it was a knot if I remember correctly.patrelsa wrote: ↑Thu Jul 27, 2023 1:39 amThis has maybe been talked about before,but my searching didn't find an answer.I have a 4 m peak 4 that slightly sheeted out will totally collapse in 20 knots of wind.Anyone have an idea what's going on or how to fix it.I run this bar no problem on all other peak 4s with no problem
Do you have a diagram... To show what you mean? I have a Peak4 in 4m and would like to verify/tune the bridle...
Peak flys on A alone. But looses shape and power and flaps like crazy. No front stall. After making B C longer you can shorten back lines (a lot!) and have higher usable depower range. Much later back stall and still no front stall.lederhosen wrote: ↑Thu Jul 27, 2023 8:23 am+1 for checking tuning. Make all levels same length again first and fly it to see if the problem is gone. A collapse when sheeting out sounds like the leading edge folds down. In that case it might be better to shorten B and C a bit instead of making it longer.
1. Make A and Z the same length by adjusting the steering lines at the bar.Fatso wrote: ↑Thu Jul 27, 2023 8:31 amDo you have a diagram... To show what you mean? I have a Peak4 in 4m and would like to verify/tune the bridle...
Yes, it flaps like crazy and cannot be really used, but Peak will never front stall. A is connected in a way the front part is stable. Problem with Peak is, the back lines are very long, so it will be at a point were kite does not work early I guess, that's what is meant by "collapse", right? And if you make back lines shorter it will back stall very early. So solution is make camber deeper (B+3 C+2 is what I used on small peak, but experiment with it!) and back lines shorter. It gives a much bigger usable range and a lot of more power to get going.Herman wrote: ↑Thu Jul 27, 2023 9:13 amIf the collapse is caused by LE luffing into a front stall it surprised me that some peeps are suggesting the addition of more camber to the profile by lengthening B and C as this, if the Peak flys like many other foils, makes the LE more likely to tuck into a front stall.
Most kites can be flown on the A but Peaks really rattle if you do that as there is no canopy pressure to keep shape; they really need bridle tension to function as a kite.