![]() Design Diagram of the steering gear of an 18th to 19th century sailing ship : 151 Helm of TS Golden BearĪ traditional ship's wheel is composed of eight cylindrical wooden spokes (though sometimes as few as six or as many as ten) shaped like balusters and all joined at a central wooden hub or nave (sometimes covered with a brass nave plate) which housed the axle. Near the start of the 18th century, a large number of vessels appeared using the ship's wheel design, but historians are unclear when the approach was first used. Until the invention of the ship's wheel, the helmsman relied on a tiller-a horizontal bar fitted directly to the top of the rudder post-or a whipstaff-a vertical stick acting on the arm of the ship's tiller. ![]() In some modern ships the wheel is replaced with a simple toggle that remotely controls an electro-mechanical or electro-hydraulic drive for the rudder, with a rudder position indicator presenting feedback to the helmsman. It is connected to a mechanical, electric servo, or hydraulic system which alters the horizontal angle of the vessel's rudder relative to its hull. Together with the rest of the steering mechanism, it forms part of the helm. Mechanism used to steer a ship or other watercraft Iconic image of a helmsman at a ship's wheel: the Gloucester Fisherman's Memorial.Ī ship's wheel or boat's wheel is a device used aboard a water vessel to steer that vessel and control its course.
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