On Nov 25, 1:36*am, Peter Scholz wrote:
on my ASW24 (CG-hook only) I regularily lock the back-release feature
when aero-towing in the alps, due to the high turbulence that can be
experienced there. I simply push a cork from an ordinary wine bottle
behind the TOST hook, so that the swiveling part of the hook is blocked.

Does your tow pilot know you're doing this? They might not be happy.

I've flown a belly hook-only glider (Janus) in strong thermals and
rotor and never had any problem with the rope back releasing due to
going slack. It takes quite a positive backwards pull to make the cage
swivel. I don't think the weight of the rope alone would do it.