A Line Driver is a clean and efficient deck part whose purpose is to support mainsheet traveler adjustement. It works by connection to a traveler in a closed circuit and it does the job of moving the traveler port and starboard without a winch.Read the full article on Line Driver

The control system is connected to a traveler on a closed circuit and ensures efficient control and a clean layout for systems such as the mainsail sheet.

Line drivers mount a self tailing sheave which operates in both direction with a textile “gripping” system that is efficient even if the circuit is not under strain and causes no wear in the rope. A clutch pin sets the direction in which the traveler moves, or allows for it to be locked in the required position. The power ratio obtainable with a normal (250 mm) handle is 8 to 1, which is much better than a tackle can offer; moreover, this system has a very limited size and weight.