Reverse Reduction Gear for Tugs and Towboats

The unique duty of tugs and towboats requires versatile performance of the gearing system that makes possible rapid and easy changes in directional movement and speed. The reverse reduction gear described here is the product of a solid background of experience and testing. Specifically, the Air-flex friction clutch is the heart of the system. Design of the clutch and gear are discussed, as well as the historical development.