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Macneill's Road Indicator
Macneill's Road Indicator was a dynamometer for ascertaining the force necessary to draw a carriage over different kind of roads and pavements. It was developed by John Benjamin Macneill in the late 1820s. Prototype Macneill's road indicator was completed according to drawings laid before and authorised by the Parliamentary Commissioners in 1829. It was first used on the road between London and Shrewsbury. A description of and the method of using it was included the Sevent report of the Commissioners(1830). Improved version Macneill made further improvement in the road indicator enable it to measure bearing, inclination, time and distance travelled. In April 1833 it was used in experiments with an iron boat on the Paddington Canal for the purpose of ascertaining the law of resistance, or force of traction, at different degrees of velocity. It was demonstrated in Regent's Park in presence of Charles Gordon-Lennox, 5th Duke of Richmond and Sir Henry Parnell 18 May 1833, and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamometer
A dynamometer or "dyno" for short, is a device for simultaneously measuring the torque and rotational speed (RPM) of an engine, motor or other rotating prime mover so that its instantaneous power may be calculated, and usually displayed by the dynamometer itself as kW or bhp. In addition to being used to determine the torque or power characteristics of a machine under test, dynamometers are employed in a number of other roles. In standard emissions testing cycles such as those defined by the United States Environmental Protection Agency, dynamometers are used to provide simulated road loading of either the engine (using an engine dynamometer) or full powertrain (using a chassis dynamometer). Beyond simple power and torque measurements, dynamometers can be used as part of a testbed for a variety of engine development activities, such as the calibration of engine management controllers, detailed investigations into combustion behavior, and tribology. In the medical terminology, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Benjamin Macneill
Sir John Benjamin Macneill FRS (1793 – 2 March 1880) was an eminent Irish civil engineer of the 19th century, closely associated with Thomas Telford. His most notable projects were railway schemes in Ireland. Life He was born in Mountpleasant near the town of Dundalk, County Louth, Ireland. Macneill started initially as a surveyor and was employed practically in laying out roads and other engineering works since 1816. His survey of the Boyne estuary became the basis of a report by Alexander Nimmo in 1826. During a trip to England in the 1820s he met engineer Thomas Telford who inspired him to become a civil engineer. Indeed, he became Telford's chief assistant for 10 years, eventually succeeding Telford as chief engineer on the massive London–Holyhead road project. He developed Macneill's road indicator in the late 1820s, an instrument for ascertaining the force necessary to draw a carriage over different kinds of roads and pavements, and consequently, the actual conditio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commissioners
A commissioner (commonly abbreviated as Comm'r) is, in principle, a member of a commission or an individual who has been given a commission (official charge or authority to do something). In practice, the title of commissioner has evolved to include a variety of senior officials, often sitting on a specific commission. In particular, the commissioner frequently refers to senior police or government officials. A high commissioner is equivalent to an ambassador, originally between the United Kingdom and the Dominions and now between all Commonwealth states, whether Commonwealth realms, republics or countries having a monarch other than that of the realms. The title is sometimes given to senior officials in the private sector; for instance, many North American sports leagues. There is some confusion between commissioners and commissaries because other European languages use the same word for both. Therefore titles such as ''commissaire'' in French, ''Kommissar'' in German and ''com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paddington Canal
The Grand Junction Canal is a canal in England from Braunston in Northamptonshire to the River Thames at Brentford, with a number of branches. The mainline was built between 1793 and 1805, to improve the route from the Midlands to London, by-passing the upper reaches of the River Thames near Oxford, thus shortening the journey. In 1927 the canal was bought by the Regent's Canal Company and, since 1 January 1929, has formed the southern half of the Grand Union Main Line from London to Birmingham. The canal is now much used by leisure traffic. Isambard Kingdom Brunel's last major undertaking was the compact Three Bridges, London, on the canal. Work began in 1856, and was completed in 1859. The three bridges are an overlapping arrangement allowing the routes of the Grand Junction Canal, Great Western and Brentford Railway, and Windmill Lane to cross. History Need By 1790, an extensive network of canals was in place, or under construction, in the Midlands. However, the on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: *Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into ''static friction'' ("stiction") between non-moving surfaces, and ''kinetic friction'' between moving surfaces. With the exception of atomic or molecular friction, dry friction generally arises from the interaction of surface features, known as asperities (see Figure 1). *Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other. *Lubricated friction is a case of fluid friction where a lubricant fluid separates two solid surfaces. *Skin friction is a component of drag, the force resisting the motion of a fluid across the surface of a body. *Internal friction is the force resisting motion between the elements making up a so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traction (engineering)
Traction, or tractive force, is the force used to generate motion between a body and a tangential surface, through the use of dry friction, though the use of shear force of the surface is also commonly used. Traction can also refer to the ''maximum'' tractive force between a body and a surface, as limited by available friction; when this is the case, traction is often expressed as the ratio of the maximum tractive force to the normal force and is termed the ''coefficient of traction'' (similar to coefficient of friction). It is the force which makes an object move over the surface by overcoming all the resisting forces like friction, normal loads(load acting on the tiers in negative 'Z' axis), air resistance, rolling resistance, etc. Definitions Traction can be defined as: In vehicle dynamics, tractive force is closely related to the terms tractive effort and drawbar pull, though all three terms have different definitions. Coefficient of traction The ''coefficient of traction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velocity
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time (e.g. northbound). Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies. Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called , being a coherent derived unit whose quantity is measured in the SI (metric system) as metres per second (m/s or m⋅s−1). For example, "5 metres per second" is a scalar, whereas "5 metres per second east" is a vector. If there is a change in speed, direction or both, then the object is said to be undergoing an ''acceleration''. Constant velocity vs acceleration To have a ''constant velocity'', an object must have a constant speed in a constant direction. Constant direction cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regent's Park
Regent's Park (officially The Regent's Park) is one of the Royal Parks of London. It occupies of high ground in north-west Inner London, administratively split between the City of Westminster and the Borough of Camden (and historically between Marylebone and Saint Pancras parishes). In addition to its large central parkland and ornamental lake, it contains various structures and organizations both public and private, generally on its periphery, including Regent's University and London Zoo. What is now Regent's Park came into possession of the Crown upon the dissolution of the monasteries in the 1500s, and was used for hunting and tenant farming. In the 1810s, the Prince Regent proposed turning it into a pleasure garden. The park was designed by John Nash and James and Decimus Burton. Its construction was financed privately by James Burton after the Crown Estate rescinded its pledge to do so, and included development on the periphery of townhouses and expensive terrace dw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Gordon-Lennox, 5th Duke Of Richmond
Charles Gordon-Lennox, 5th Duke of Richmond, (3 August 179121 October 1860), of Goodwood House near Chichester in West Sussex, was a British peer, soldier and prominent Conservative politician. Origins He was born "Charles Lennox", the son and heir of Charles Lennox, 4th Duke of Richmond (1764-1819) by his wife Lady Charlotte Gordon, the eldest child of Alexander Gordon, 4th Duke of Gordon. Until his father's death in 1819 he was styled Earl of March, a courtesy title, being one of his father's subsidiary titles. Education He was educated at Westminster School in London and Trinity College, Dublin. Military career As Earl of March, he served on Wellington's staff in the Peninsular War, during which time he volunteered to join the 52nd (Oxfordshire) Regiment of Foot's advance storming party on the fortress of Ciudad Rodrigo.Moorsom, W.S. ''Historical Record of the Fifty-Second Regiment (Oxfordshire Light Infantry)'', London: Richard Bentley, 1860, p. 443 He formally joine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Parnell
Henry Brooke Parnell, 1st Baron Congleton PC (3 July 1776 – 8 June 1842), known as Sir Henry Parnell, Bt, from 1812 to 1841, was an Irish writer and Whig politician. He was a member of the Whig administrations headed by Lord Grey and Lord Melbourne of the 1830s and also published works on financial and penal questions as well as on civil engineering. He was a grand-uncle to the Irish nationalist leader Charles Stewart Parnell. Background and education Parnell was the second son of Sir John Parnell, 2nd Baronet, Chancellor of the Irish Exchequer, and Laetitia Charlotte, daughter of Sir Arthur Brooke, 1st Baronet. His younger brother William Parnell-Hayes was the grandfather of Charles Stewart Parnell. He was educated at Eton and Trinity College, Cambridge. In 1801 he inherited the family estates in Queen's County on the death of his father, bypassing his disabled elder brother according to a special Act of Parliament passed in 1789. In 1812 he succeeded as fourth Baronet, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toll Road
A toll road, also known as a turnpike or tollway, is a public or private road (almost always a controlled-access highway in the present day) for which a fee (or ''toll'') is assessed for passage. It is a form of road pricing typically implemented to help recoup the costs of road construction and maintenance. Toll roads have existed in some form since antiquity, with tolls levied on passing travelers on foot, wagon, or horseback; a practice that continued with the automobile, and many modern tollways charge fees for motor vehicles exclusively. The amount of the toll usually varies by vehicle type, weight, or number of axles, with freight trucks often charged higher rates than cars. Tolls are often collected at toll plazas, toll booths, toll houses, toll stations, toll bars, toll barriers, or toll gates. Some toll collection points are automatic, and the user deposits money in a machine which opens the gate once the correct toll has been paid. To cut costs and minimise time delay, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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