I came up with a new self launch system made of a surplus safety leash, paracord, carabiners, and some bungees. Took about an hour to make with items readily available.
I think I made a stupid mistake: the bungees does not increase load force, all force is controlled by the release handle.The bungees still serve the purpase of taking up some slack before releasing. How to increase load forces beyond that?
Essentially it is a leash that releases automatically on load, but still flags the kite.
The assembled system ready for launch:
If the kite starts to launch prematurely, the system should release and flag the kite before an anchor is overloaded:
This solves the problem of weak anchors loosing the kite easily, and solid anchors becoming really dangerous if they can't hold anyway.
I added captions to each image in a photo sequence in the link below explaining things in more detail. The last pictures shows a launch with a less safe suicide setup.https://picasaweb.google.com/115960953431962890354/SaferSelfLaunch
Note that the red section is a standard self land / launch rope that is good to have around separately. The yellow section is the optional auto flagging system.
Warning: system only tested by pulling the bar, no kite has been launched with it yet. Load force may have to be adjusted. Suggestions are welcome. Use at own risk.