The knot would spin at the wheel speed and strike the dog on the snout when he got too close. The idea was to train the dog not to chase cars without killing him. Is that what you were asking?
Thanks. Didn’t understand how long the rope was as the results would be completely different depending on length.
That would only work for dogs that get close to the wheels.
Most I know of don’t get that close to the wheels. Our dogs haven’t.