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A cyclist steering a bicycle by turning the handlebar and leaning. Steering is the control of the direction of motion [1] or the components that enable its control. [2] Steering is achieved through various arrangements, among them ailerons for airplanes, rudders for boats, cylic tilting of rotors for helicopters, [3] and many more.
Autorotation is permitted mechanically because of both a freewheeling unit, which allows the main rotor to continue turning even if the engine is not running, as well as aerodynamic forces of relative wind maintaining rotor speed. It is the means by which a helicopter can land safely in the event of complete engine failure.
However, due to the weight transfer inherent while turning, the outside wheels bear more of the force of turning and negative camber will improve handling overall. Caster angle will also compensate for this to a degree, as the top of the outside tire will tilt slightly inward, and the inner tire will respectively tilt outward. However, any ...
Many tire manufacturers say that tire rotation is no longer necessary, except to ensure that best tires are fitted at the rear of the vehicle. [5] In practice this means that when the front tires become worn, the new ones should be fitted to the rear, moving the old rear tires to the front. Best tires on rear of vehicle
The term scrub radius derives from the fact that either in the positive or negative mode, the tire does not turn on its centerline (it scrubs the road in a turn) and due to the increased friction, more effort is needed to turn the wheel. Large positive values of scrub radius, 4 inches/100 mm or so, were used in cars for many years.
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The free-spinning blades turn by autorotation; the rotor blades are angled so that they not only give lift, [10] but the angle of the blades causes the lift to accelerate the blades' rotation rate until the rotor turns at a stable speed with the drag force and the thrust force in balance.