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As the coefficient of friction between steel wheels and rails seldom exceeds 0.25 in most cases, improving a locomotive's power-to-weight ratio is often counterproductive. However, the choice of power transmission system, such as variable-frequency drive versus direct-current drive , may support a higher power-to-weight ratio by better managing ...
Polaris then recalled the sleds and quickly developed a new prototype to avoid bankruptcy. [8] The new model, the 1965 Mustang, became a hit as a family snowmobile and boosted Polaris sales. Polaris continued to develop snowmobiles similar to this model throughout the 1960s-1970s, and went on to become one of the leaders in the snowmobile industry.
The S and SL models include a 20x9-inch back wheel fitted with a 255mm width tire, and 18x7.5-inch front wheels with 225mm wide tires. The SLR and R models have the same front wheels and tires, but feature an upgraded 20x11-inch rear wheel fitted with a 305mm wide tire. All models have a front double wishbone suspension with an anti-roll bar.
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Freewheel mechanism Ratcheting freewheel mechanism (van Anden, 1869). In mechanical or automotive engineering, a freewheel or overrunning clutch is a device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft.
Safety courses and educational literature reduced the number and severity of accidents among ATC and ATV riders. As cornering is more challenging on a three-wheel ATC than with a four-wheeled machine, properly leaning into the turn is required to counterbalance the weight and keep the machine stable. Careless operators may roll over at high speeds.
A Mecanum wheel is an omnidirectional wheel design for a land-based vehicle to move in any direction. It is sometimes called the Swedish wheel or Ilon wheel after its inventor, Bengt Erland Ilon (1923–2008), [ 1 ] who conceived of the concept while working as an engineer with the Swedish company Mecanum AB, and patented it in the United ...
When braking, depending on the location of the combined center of mass of the bike and rider with respect to the point where the front wheel contacts the ground, and if the front brake is applied hard enough, bikes can either: skid the front wheel which may or not result in a crash; or flip the bike and rider over the front wheel.