Cycloid Cycloid A cycloid is the curve traced by a point on the rim of a circular wheel as the wheel rolls along a straight line without slipping. A cycloid is a specific form of trochoid and is an example of a roulette, a curve generated by a curve rolling on another curve. The cycloid, with the cusps pointing upward, is the curve of fastest descent under constant gravity, and is also the form of a curve for which the period of an object in descent on the curve does not depend on the object's starting position. The cycloid has been
Rolling stock of the South Manchuria Railway etc. of a given wheel arrangement. This was followed by a unit serial number in Roman numerals. The first two katakana indicated the wheel arrangement, derived from the American naming system: Self-moving rolling stock powered by something other than steam used a different system, which indicated the type of powerplant. Railway cranes were also classified like this. The third katakana in the class name was the class number, derived from the first syllable of the corresponding Japanese number: When the operation and management of the Manchukuo National Railway and of the North China Transportation Company were transferred to Mantetsu, their