On Apr 13, 8:01*am, wrote:

It would be worthwhile to look at the origin of the placard to
determine what it really means.
Example. Schweizer hooks for many applications have a maximum rope
strength specified of 1200 lb. This effectively limits the max weight
of the glider to be towed to 1500 lb based on min rope strength of 80%
of max gross weight of the glider..
The basis of this specification, if I recall correctly, was force on
the release handle.
Rope strength is specified with limits related to the max certified
gross weight of the glider being towed, that is NTL .80 of gross wt
and NGT than 2.0 times gross wt. Weak links can be used, as
appropriate to saty within these limits.
If the approved installation of the tow hook has other limits, they
are in addition to those related to the glider defined limits.
If you are using a hook not produced for towing gliders(there are lots
of home made banner towing hooks made to AC 43-13 which may not be
suitable for glider towing), consider moving to a proven tow hook
installation.
Good Luck
UH

So in your example, a Schweizer hook is limited to 1200 lbs and it
would be acceptable to tow a 1500 lb glider as long as the rope (or
weak link setup) was rated at 1200 lbs?