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1910 "New Pattern' James with hub-center steering Detail of mechanism on the Mead & Tomkinson Kawasaki 'Nessie' Steven Linsdell's Yamaha GTS Isle of Man TT racing motorcycle The hub-center steer concept is a very old one used as early as 1910 by the British James Cycle Co , and in 1920 by Ner-a-Car , and enjoyed an aftermarket vogue in the ...
One-way bearing combining sprags and bearing rollers in one race Sprags jam when driven and slide when in reverse. A sprag clutch is a one-way freewheel clutch.It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags, or other elements allowing single direction rotation, are used.
Slipper clutches can also prevent a catastrophic rear wheel lockup in case of engine seizure. Generally, the amount of force needed to disengage the clutch is adjustable to suit the application. Slipper clutches have also been used to a lesser extent on automobiles, primarily those powered by motorcycle engines.
A hub gear, [1] internal-gear hub, [2] internally geared hub [3] or just gear hub [4] is a gear ratio changing system commonly used on bicycles that is implemented with planetary or epicyclic gears. The gears and lubricants are sealed within the shell of the hub gear, in contrast with derailleur gears where the gears and mechanism are exposed ...
Most user guides contain both a written guide and associated images. In the case of computer applications, it is usual to include screenshots of the human-machine interface(s), and hardware manuals often include clear, simplified diagrams. The language used is matched to the intended audience, with jargon kept to a minimum or explained thoroughly.
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The hydraulic shock absorbers used on the rear suspensions of motorcycles are essentially the same as those used in other vehicle applications. Motorcycle shocks do differ slightly in that they nearly always use a coil-over spring. In other words, the spring for the rear suspension is a coil spring that is installed over, or around, the shock.
Unlike locking hubs, CAD systems are generally automatic and engaged when the vehicle is placed in four wheel drive. Due to the lack of driver control over the CAD, it is not as well known to the public as manual locking hubs are (but no different from automatic locking hubs in terms of driver involvement, and manual hubs are rare on modern 4x4 vehicles).