- straight line intersection
- equal proportions
IN is called when the kite is at ^90 <25. After 25% horizontal flight the kite enters an eight figure. The diameter of each arc is approximately 30% with the bottom of the eight at ^10. The point where the two straight lines intersect is at ^50 height. The kite 'leaves' the eight figure at ^90 <>0, the same point where it entered. OUT is called when the kite has flown 25% horizontally at ^90.
NB STACK are aware that there is a discrepancy between the diagram and the description.