A Google search away. http://www.aaib.gov.uk/publications/...lider__gdp.cfm

The onus is really not on people to prove doing things are unsafe, the onus is really more on doing things that might be unsafe and proving they are indeed, contrary to obvious concerns, safe.

Like many other owners/pilots I observed, I have installed systems in multiple gliders that have cable connector breakaways (e.g. with telco connectors with the retaining tab mostly removed) and tested as best I can on the ground to make sure the separation works with very little force. etc. to allow easy canopy jettison. I also woudl not want long pieces of cable coming back at the pilot, maybe flailing around in the wind etc. while the pilot is tryign to undo their harness and deal with everything else going on. If you have installed cables fixed to a canopy and think the cable will break and allow straightforward canopy jettison maybe you could share your calculations/design and any testing you did here.