"Jim Vincent" wrote in message
...
What about the towhook? Magnetic sensor? where? How? Other ideas

Install a strain gauge internal to the fuselage right up against the hook
mount. Get Peter Masak to design a simple circuit that trips an
electronic
relay when the strain exceeds a certain amount. Knowing Peter, it should
take
him less than an hour.

Jim, if you go that route, build the strain gauge to display the hook
tension to the pilot for the purposes of flying a winch launch.

Bill Daniels