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S 1:64 22.45 mm (0.884 in) S-scale is the same proportion in NEM, NMRA and the UK. S Scale Model Railway Society is the custodian of British S-scale. O14: 1:43.5: 14 mm (0.551 in) For accurately representing 2 ft narrow gauge in 7 mm scale. 0 or 7 mm: 1:43.5: 32 mm (1.26 in) Three sub-standards: coarse, unified and fine.
Layout Stirmouth & Southern Railroad Company in On30 gauge, based on the Bachmann Industries models.. On30 (also called On2 1 ⁄ 2, O16.5 and Oe) gauge is the modelling of narrow gauge railways in O scale on HO (16.5 mm / 0.65 in) gauge track in 1:48 scale ratio by American and Australian model railroaders, in 1:43.5 scale ratio by British and French model railroaders and 1:45 by Continental ...
The difference of On2 scale, compared to its nearest alternative (On30), is that On2 scale equates to the correct track gauge for 2 ft prototypes - such as Maine "Two Footers" and the many industrial operations that used or continue to use this gauge - including existing 21st century sugar cane operations in Australia, Fiji, Indonesia.
The combination of 4 mm scale and 16.5 mm gauge has remained the UK's most popular scale and gauge ever since. In the United States, Lionel Corporation introduced a range of OO models in 1938. Soon other companies followed but it did not prove popular and remained on the market only until 1942, when Lionel train production was shut down due to ...
Some designs such as those used with older Apple computers (Lisa, early Macintosh, later II's) were more complex and used variable rotational speeds and per-track storage density (at a constant read/record rate) to store more data per disc; for example, between 394 rpm (with 12 sectors per track) and 590 rpm (8 sectors) with Mac's 800 kB double ...
The turn (symbol tr or pla) is a unit of plane angle measurement that is the measure of a complete angle—the angle subtended by a complete circle at its center. One turn is equal to 2π radians, 360 degrees or 400 gradians.
The use of the vernier scale is shown on a vernier caliper which measures the internal and the external diameters of an object. The vernier scale is constructed so that it is spaced at a constant fraction of the fixed main scale. So for a vernier with a constant of 0.1, each mark on the vernier is spaced 9/10 of those on the main scale.
PRR S1 #6100 hauling the Trail Blazer, PRR's premier, luxury all-coach train between New York and Chicago in Nov 1942. The S1 began its passenger train services starting from December 1940, on the run between Chicago and Pittsburgh. On its first run out of Fort Wayne, Indiana, the crew was led by H.H. Lehman (Fireman), C.J. Wappes (Road Foreman ...
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