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Especially in steam days, wheel arrangement was an important attribute of a locomotive because there were many different types of layout adopted, each wheel being optimised for a different use (often with only some being actually "driven"). Modern diesel and electric locomotives are much more uniform, usually with all axles driven.
Centrifugal force and stability: When a train navigates a curve, centrifugal force acts outward, which can destabilize the train. To counter this, tracks are often tilted (superelevation) to balance the force. Wheel-rail interaction: Tight curves can cause higher lateral forces between wheels and rails, increasing wear and the risk of derailment.
The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads.Essentially a simplification of the European UIC classification, it is widely used in North America to describe diesel and electric locomotives (including third-rail electric locomotives).
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Fare dodging is rife on Britain’s railways. “The last time this was looked at by the industry, there was around about £300m per annum going out of the industry because of fare-dodging ...
A volvelle or wheel chart is a type of slide chart, a paper construction with rotating parts. It is considered an early example of a paper analog computer . [ 1 ] Volvelles have been produced to accommodate organization and calculation in many diverse subjects.
Bo′Bo′ (UIC) or Bo-Bo (Commonwealth) is the indication of a wheel arrangement for railway vehicles with four axles in two individual bogies, all driven by their own traction motors. It is a common wheel arrangement for modern electric and diesel-electric locomotives , as well as power cars in electric multiple units .