andylc wrote: ↑
Fri Jan 05, 2018 8:54 pm
Difficult to imagine a more stable foil kite than the Chrono V2...and if I get more hang time I may need to bring a book with me...
Stability variables are extremely subjective and have at least two stability solutions.
Using analogous kayak terminology as a base line:
A kite can have primary stability.
A kite can have secondary stability.
Primary kite stability is easiest to relate to "beginners" stability. Most easy going beginner kites (and wave kites) have this property. Primary stability kites almost fly themselves and very little attention to "feel" is needed to keep them flying. They almost never over fly the window. They are very gradual on the power development. They hang back even in an updraft, while at the same time allow a stall recovery high up in the window. The problem with these kites is that they do almost everything on their own and do not allow access to the full range of power/placement in the window needed for pushing the limits of the kite/board system.
Secondary stability is easiest to relate to "the number of controls available" on the kite. Extreme attention to inputs and feedback is needed to make these kites do what you want, and even keep them under control. If you are not familiar with all of the controls available in a secondarily stable kite, you will not be able to comfortably fly it. Kites with secondary stability will overfly the window, but will also allow sheeting or turning as a control input to eliminate overfly as it is happening or before it happens - sheeting as overfly control usually indicates an extremely secondarily stable kite. Secondarily stable kites also have access to (stall) power development control via sheeting. Most foil kites can spill some power in the back of the window via "over sheeting" or partial stall while still flying forward in the window (SLE's have a harder time doing this as the wind speed increases likely due to "cone" canopy distortion). Given the additional number of controls, these kites can access the limits of the kite/board system.
If a kite feels dead and you can't make it do what you want, AND it is easy to control and ride, you have a kite with good primary stability.
If a kite feels out of control:
1. You may have a kite with good secondary stability, but you may not understand the control inputs for that kite.
2. Or, you may have a kite with no primary stability, AND no secondary stability.
In my experience:
Good primary stability kites - Naish "Ride", Ozone "Access", HQ "Montana 8", HQ "Matrixx II", Flysurfer "Speed Series"
Good secondary stability kites - Slingshot "RPM", HQ "Apex" (does not make a good beginners kite unless 3m used as a trainer), HQ "Matrixx I" (my primary kite for snowkiting) HQ "Montana 5 and 6", Ozone "Chrono v2"
Bad kites that lacked either primary or secondary - Ozone "Summit v1", Maybe HQ "Montana 7", all older Pansh with factory tuning.
Kites in the middle with some properties of both - Best "Kahoona", Slingshot "Rally", Cabrinha "Switchblade"