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L1020402
L1, L01, L.1, L 1 or L-1 may refer to: Mathematics, science and technology Math *L1 distance in mathematics, used in taxicab geometry * L1, the space of Lebesgue integrable functions * ℓ1, the space of absolutely convergent sequences Science *L1 family, a protein family of cell adhesion molecules *L1 (protein), a cell adhesion molecule *, Lagrangian point 1, the most intuitive position for an object to be gravitationally stationary relative to two larger objects (such as a satellite with respect to the Earth and Moon) *Anthranilic acid, also called vitamin L1 *The first lumbar vertebra of the vertebral column in human anatomy * The first larval stage in the ''Caenorhabditis elegans'' worm development Technology *L1, one of the frequencies used by GPS systems (see GPS frequencies) *L1, the common name for the Soviet space effort known formally as Soyuz 7K-L1, designed to launch men from the Earth to circle the Moon without going into lunar orbit *ISO/IEC 8859-1 (Lati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxicab Geometry
A taxicab geometry or a Manhattan geometry is a geometry whose usual distance function or metric of Euclidean geometry is replaced by a new metric in which the distance between two points is the sum of the absolute differences of their Cartesian coordinates. The taxicab metric is also known as rectilinear distance, ''L''1 distance, ''L''1 distance or \ell_1 norm (see ''Lp'' space), snake distance, city block distance, Manhattan distance or Manhattan length. The latter names refer to the rectilinear street layout on the island of Manhattan, where the shortest path a taxi travels between two points is the sum of the absolute values of distances that it travels on avenues and on streets. The geometry has been used in regression analysis since the 18th century, and is often referred to as LASSO. The geometric interpretation dates to non-Euclidean geometry of the 19th century and is due to Hermann Minkowski. In \mathbb^2 , the taxicab distance between two points (x_1, y_1) and (x_2, y_ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lawrance J-1
The Lawrance J-1 was an engine developed by Charles Lanier Lawrance and used in American aircraft in the early 1920s. It was a nine-cylinder, air-cooled radial design. Development During World War I the Lawrance Aero Engine Company of New York City produced the crude opposed twins that powered the Penguin trainers, and the Lawrance L-1 60 hp Y-type radial.Janes Fighting Aircraft of World War I by Michael John Haddrick Taylor (Random House Group Ltd. 20 Vauxhall Bridge Road, London SW1V 2SA, 2001, ), p. 290 After the end of World War I, the Lawrance engineers worked with both the Army and the Navy in developing their L-1 onto a nine-cylinder radial engine, which became the 200 hp Model J-1. It was the best American air-cooled engine at the time and passed its 50-hour test in 1922. The U.S. Navy badly needed light, reliable engines for its carrierborne aircraft. As a means of pressuring Wright and other companies into developing radial engines, it gave a contract to L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SR L1 Class
The Southern Railway L1 class was a class of 4-4-0 steam tender locomotives built for express passenger service on the South Eastern Main Line of the Southern Railway. They were designed by Richard Maunsell as a development of Harry Wainwright's L class. Background Harry Wainwright had built two useful and attractive 4-4-0 classes for the South Eastern and Chatham Railway between 1902 and 1908; the D class and the E class, and had completed designs for a larger L class at the time of his retirement at the end of 1913. However, by 1918 they were beginning to struggle with the heaviest express trains. Wainwright's successor, Richard Maunsell, therefore rebuilt several examples of the D and E classes immediately before the grouping of the SECR with other railways to form the Southern Railway in 1923. When Maunsell was appointed as Chief Mechanical Engineer of the new railway he turned his attention to designing new K & K1 class 2-6-4 tank engines. However, in 1926 there w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SP&S Class L-1
Spokane, Portland and Seattle Railway Class L-1 was a class of 4-4-0 steam locomotives built in 1889 by Schenectady Locomotive Works The Schenectady Locomotive Works built railroad locomotives from its founding in 1848 through its merger into American Locomotive Company (ALCO) in 1901. After the 1901 merger, ALCO made the Schenectady plant its headquarters in Schenectady, New .... References L-1 4-4-0 locomotives Schenectady Locomotive Works locomotives Steam locomotives of the United States Standard gauge locomotives of the United States Railway locomotives introduced in 1889 {{US-train-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soo Line L-1 Class
The Soo Line L-1 class was a class of ten 2-8-2 (Mikado) steam locomotives built by the American Locomotive Company in 1913 for the Minneapolis, St. Paul and Sault Ste. Marie Railway (“Soo Line”). Background Having acquired America's first Mikado (2-8-2) type when it merged the Bismarck, Great Falls and Washburn Railway in 1904, it was eight years before the Soo Line ordered a 2-8-2 of its own. Ten locomotives were ordered from the American Locomotive Company, and built by their Schenectady, New York plant in 1913. Service The L-1 class were used for powering time freights system wide on both the Minneapolis, St. Paul and Sault Ste. Marie, and Wisconsin Central. They were assisted in that role by the 1920 arrival of the 25 L-2 and L-20 class Mikados in 1920, but were bumped into lesser roles with the arrival of the 21 N-20 class 4-8-2 Mountains in 1926–1930. The 1938 delivery of four O-20 class 4-8-4 Northern made little difference to the L-1 class since the former wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Railroad Class L1s
Class L1s on the Pennsylvania Railroad comprised 574 2-8-2 "Mikado" type steam locomotives constructed between 1914 and 1919 by the railroad's own Juniata Shops (344 examples) as well as the Baldwin Locomotive Works (205) and the Lima Locomotive Works (25). It was the largest class of 2-8-2 locomotives anywhere, although other railroads had more Mikados in total. The L1s shared the boiler and many other components with the K4s 4-6-2 "Pacific" type, giving a total of 425 locomotives with many standard parts. Although the L1s type was quite successful, it was very much eclipsed in PRR service by the larger and more powerful I1s/I1sa 2-10-0 "Decapods", which arrived in service only two years after the L1s and were very suited to the PRR's mountain grades and heavy coal and mineral trains, and by the 1923 introduction of the M1 4-8-2 "Mountains" which took on the best high-speed freight runs. Large numbers of the class were stored out of service during the Great Depression, only to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Counties Committee
The Northern Counties Committee (NCC) was a railway that served the north-east of Ireland. It was built to Irish gauge () but later acquired a number of narrow gauge lines. It had its origins in the Belfast and Ballymena Railway that opened to traffic on 11 April 1848. The NCC itself was formed on 1 July 1903 as the result of the Midland Railway of England taking over the Belfast and Northern Counties Railway (BNCR), which the Belfast and Ballymena Railway had become. At the Railways Act 1921, 1923 Grouping of British railway companies, the Committee became part of the London Midland & Scottish Railway (LMS). After the Transport Act 1947, nationalisation of Britain's railways in 1948 the NCC was briefly part of the British Transport Commission, which sold it to the Ulster Transport Authority (UTA) in 1949. The BNCR and its successors recognised the potential value of tourism and were influential in its development throughout Northern Ireland. They were able to develop and expl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LNER Thompson Class L1
The London and North Eastern Railway (LNER) Thompson Class L1 was a class of 2-6-4T steam locomotives designed by Edward Thompson (engineer), Edward Thompson. The prototype no. 9000 was built in 1945, but the remaining 99 were built under British Railways jurisdiction in the period 1948–1950. Overview The class, at least on paper, should have been very free steaming and powerful engines but, in practice, they were not suited to the work to which they were assigned. The engines had driving wheels, which would give them excellent power at low speed, such as that required for freight work, but these engines were intended for passenger use. The speeds required for suburban passenger work wore the engines out in a remarkably short time. Axleboxes, crosshead slides and crank bearings all suffered due to the high speeds. Accidents and incidents *On 19 November 1958, a freight train overran signals and was in a rear-end collision with another at Hitchin, Hertfordshire. A third frei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GNR Class L1
The Great Northern Railway (GNR) Class L1 (LNER Class R1) was a 0-8-2T side tank steam locomotive designed by Henry Ivatt. It was originally designed for suburban passenger traffic on the Metropolitan City Lines. A prototype was built in 1903, but it was overweight, so it was rebuilt with a smaller boiler and shorter side tanks. Ten more engines were then built to this modified design. During the "small boiler" era, the cylinders were lined to 18" to match the boilers. In 1905 and 1906, thirty more engines were built for working goods trains in the West Riding of Yorkshire. The original eleven engines were not a great success on passenger services so, in 1907, they were moved to the West Riding for goods work. Condensing apparatus The first eleven locomotives were fitted with condensing apparatus for working in tunnels. The thirty built for the West Riding were probably not so fitted, but this is subject to confirmation. It is not known whether the condensing apparatus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GCR Class 1B
The GCR Class 1B was a class of 2-6-4T (tank) locomotives on the Great Central Railway. They were notable as the first locomotives of the 2-6-4T (or ''Adriatic'') wheel arrangement to be used by a British standard-gauge railway; there had been two narrow-gauge examples on the Leek & Manifold Valley Light Railway since 1904. History In 1906, the Great Central Railway (GCR) had inherited nine 0-6-4T locomotives from the Lancashire, Derbyshire and East Coast Railway (LD&EC), of class D (LNER class M1). These had been designed to the specifications of Robert A. Thom, the locomotive superintendent of the LD&EC, for hauling coal trains from northern Derbyshire and Nottinghamshire to the docks at Grimsby. They were built by Kitson & Co in 1904 and 1906, and performed well. When further locomotives were required for similar duties, opportunity was taken to produce an updated design. The 1B class locomotives were designed by the GCR's locomotive superintendent John G. Robinson, wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erie L-1
The three L-1 0-8-8-0 steam locomotives of the Erie Railroad, built in July 1907 by ALCO, and numbered 2600, 2601 and 2602 (ALCo construction numbers 42269, 42270 and 42271 respectively); were unique in that they were the only articulated camelback locomotive A camelback locomotive (also known as a Mother Hubbard or a center-cab locomotive) is a type of steam locomotive with the driving cab placed in the middle, astride the boiler. Camelbacks were fitted with wide fireboxes which would have severely ...s ever built. When built in 1907, they were the largest steam locomotives in the world as the locomotive itself weighed 410,000 pounds (260 tons). The L-1 Class was also called the "Angus" Type in homage to Angus Sinclair, who was the publisher of Railway & Locomotive Engineering, a leading trade journal. A rarely seen photograph of #2602 shows his name under the windows on the cab sides. The use of an intercepting valve allowed the locomotive to be used in simple or single e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
L1A1 Self-Loading Rifle
The L1A1 Self-Loading Rifle, officially "Rifle, 7.62mm, L1A1", also known just as the SLR (Self-Loading Rifle), by the Canadian Army designation C1A1 (C1) or in the US as the "inch pattern" FAL,Especially on the American surplus market. is a British version of the FN FAL battle rifle produced by the Belgian armaments manufacturer FN Herstal. The L1A1 was produced under licence and has seen use in the Australian Army, Canadian Army, Indian Army, Jamaica Defence Force, Malaysian Army, New Zealand Army, Rhodesian Army, Singapore Army and the British Armed Forces. The original FAL was designed in Belgium, while the components of the "inch-pattern" FALs are manufactured to a slightly modified design using British imperial units. Many sub-assemblies are interchangeable between the two types, while components of those sub-assemblies may not be compatible. Notable incompatibilities include the magazines and the butt-stock, which attach in different ways. Most FALs also use SAE thread ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
