The rotator was connected to the log by a rope 6 ft.
In Thomas Walker's harpoon or frictionless log, introduced in 1861, the wheelwork was enclosed in a cylindrical case of the same diameter as the body of the rotator or fan, and the latter was brought close up to the register, forming a compact machine and avoiding the use of the 6-ft.
4 the shoe H is secured to the taffrail, and the rotator in the water is hooked to the eye of the spindle M by the hook D.
The outer pair receive the strain of the rotator, and the inner are for adjustment and to prevent lateral movement.
The blades of the rotator are adjustable, being fitted into its tube or body by slits and holes and then soldered.