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  2. Locking hubs - Wikipedia

    en.wikipedia.org/wiki/Locking_hubs

    Automatic free wheeling hub of a 1986 Mitsubishi Pajero Mechanically (manually) activated free wheeling hub on a Toyota Land Cruiser J60 from the 1980s, with marked turning positions free and lock Locking hubs , also known as free wheeling hubs are fitted to some (mainly older) four-wheel drive vehicles, allowing the front wheels to rotate ...

  3. Freehub - Wikipedia

    en.wikipedia.org/wiki/Freehub

    Freehub vs freewheel hub. The freehub concept answers several drawbacks encountered with the freewheel design: Freewheels are threaded onto an axle hub, using conventional right-hand threads. As the bicycle rider pedals, the freewheel is continuously kept tight, as chain torque is in the right-hand direction. This becomes a problem when the ...

  4. Freewheel - Wikipedia

    en.wikipedia.org/wiki/Freewheel

    In a fixed-gear bicycle, without a freewheel, the rear wheel drives the pedals around. An analogous condition exists in an automobile with a manual transmission going downhill, or any situation where the driver takes their foot off the gas pedal, closing the throttle: the wheels drive the engine, possibly at a higher RPM.

  5. Sprag clutch - Wikipedia

    en.wikipedia.org/wiki/Sprag_clutch

    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.

  6. Front freewheel - Wikipedia

    en.wikipedia.org/wiki/Front_freewheel

    The Shimano Front Freewheel (FFS) was a proprietary bicycle drivetrain design of the 1970s that placed a freewheel between the pedal cranks and the front chainrings – enabling the rider to shift gears while coasting. [2] FFS rear freewheel is different than a standard freewheel because it's "stiff" with more friction than a normal rear freewheel.

  7. 3-pronged parts retriever - Wikipedia

    en.wikipedia.org/wiki/3-Pronged_Parts_Retriever

    The tool is mainly used to retrieve screws, although is also helpful in retrieving jammed bits in the motherboard. Other uses include paper removal, device handling, and item maneuvering. References

  8. Fixed-gear bicycle - Wikipedia

    en.wikipedia.org/wiki/Fixed-gear_bicycle

    A track bicycle or track bike is a form of fixed-gear bicycle optimized for racing at a velodrome or at an outdoor track. Some road racing and club cyclists use a fixed-gear bicycle for training during the winter months, generally using a relatively low gear ratio, believed to help develop a good pedalling style. [5]

  9. Flywheel energy storage - Wikipedia

    en.wikipedia.org/wiki/Flywheel_energy_storage

    NASA G2 flywheel. Flywheel energy storage (FES) works by accelerating a rotor to a very high speed and maintaining the energy in the system as rotational energy.When energy is extracted from the system, the flywheel's rotational speed is reduced as a consequence of the principle of conservation of energy; adding energy to the system correspondingly results in an increase in the speed of the ...