A little while ago this great insight into hang glider stability was published on You Tube. If you are a Hang Gliding nut then it is fascinating :
link : Gerolf on Sprogs

I have played with my own sprogs, with varying results, and never feeling very comfortable about doing the adjustments and following test fly. The video inspired me to go buy a $40 digital level and make some measurements.

The day is cancelled again due to strong winds - more of the same forecast for tomorrow. Could it be a 3 task comp? RESULTS

Thomas Pelicci is describing a bit about sprog settings. There was a huge conversation of what to do in the future to prevent tumbles, how to measure the sprog pitch and how to get it in betwen different manufacturers.

Hope it will come helpfull for you readers and there is still more to come about it.

Stay tuned :)