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Hanscotte Centre-rail System
The Hanscotte system was a design for railway locomotives and track using, in addition to the conventional load-bearing driving wheels, pairs of horizontal driving wheels mounted underneath the locomotive and pressing inwards upon a central rail, to improve adhesion and Traction (engineering), traction. The engineer developed the system while working for Société de construction des Batignolles (SCB), Paris, in about 1904. SCB intended to use the system for braking very heavy trains, but the most notable deployment was on the Chemin de Fer du Puy-de-Dôme, a tourist light railway between Clermont Ferrand and the summit of the Puy de Dôme, Puy-de-Dôme, in 1906. Development In 1898 Hanscotte was working for the engineering company Société de Construction des Batignolles (SCB) (successor to Ernest Goüin et Cie., the company contracted to build Fell mountain railway system, Fell system centre-rail locomotives for the Mont Cenis Pass Railway in 1867). In 1904 he started work on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adhesion
Adhesion is the tendency of dissimilar particles or interface (matter), surfaces to cling to one another. (Cohesion (chemistry), Cohesion refers to the tendency of similar or identical particles and surfaces to cling to one another.) The forces that cause adhesion and cohesion can be divided into several types. The intermolecular forces responsible for the function of various kinds of stickers and sticky tape fall into the categories of chemical adhesion, dispersive adhesion, and diffusive adhesion. In addition to the cumulative magnitudes of these intermolecular forces, there are also certain emergent mechanical effects. Surface energy Surface energy is conventionally defined as the work (physics), work that is required to build an area of a particular surface. Another way to view the surface energy is to relate it to the work required to cleave a bulk sample, creating two surfaces. If the new surfaces are identical, the surface energy γ of each surface is equal to h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
