On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive). On a conventional, non-articulated locomotive, the driving wheels are all coupled together with side rods (also known as coupling rods); normally one pair is directly driven by the main rod (or connecting rod) which is connected to the end of the piston rod; power is transmitted to the others through the side rods.
On an articulated locomotive or a rigid-framed locomotive with divided drive, such as a Duplex locomotive, driving wheels are grouped into sets which are linked together within the set.
Driving wheels are generally larger than leading or trailing wheels. Since a conventional steam locomotive is directly driven, one of the few ways to 'gear' a locomotive for a particular performance goal is to size the driving wheels appropriately. Freight locomotives generally had driving wheels between 40" and 60" in diameter; dual-purpose locomotives generally between 60" and 70", and passenger locomotives between 70" and 100" or so.
Driving wheel on tracked vehicles (such as tank or bulldozer) is a large chain wheel that moves the track and rotates it around it.
On a steam locomotive, a drivingwheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive).
On a conventional, non-articulated locomotive, the drivingwheels are all coupled together with side rods (also known as coupling rods); normally one pair is directly driven by the main rod (or connecting rod) which is connected to the end of the piston rod; power is transmitted to the others through the side rods.
The drivingwheel or drive sprocket on tracked vehicles (such as tank or bulldozer) is a large chain wheel that moves the track and rotates it around it.
Wheels are used in conjunction with an axle, either the wheel turns on the axle or the wheel is rigidly attached to the axle which then turns in bearings in the body of the vehicle.
The invention of the wheel thus falls in the late Neolithic and may be seen in conjunction with the other technological advances that gave rise to the early Bronze Age.
The invention of the wheel turned out to be of great importance not only as a transportation device, but for the development of technology in general, important applications including the water wheel, the cogwheel (see also antikythera mechanism), the spinning wheel, the astrolabe or torquetum.
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