I'd go for 'spoiler open' alarm sounding when open IF my hand is not
on the actuator. On tow or off tow, if they are open and I did not
open them I'd want to know. I've had both situations happen. My fault
both times.

Might make wiring a bit simpler.

Bob

illspam (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 Vincent
CFIG
N483SZ
illspam