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NZR D Class (1929)
The NZR D class of 1929 comprised one 0-4-0 tank locomotive that was built for the New Zealand Railways Department by the Clayton Wagons Ltd in Lincoln, England. History Originally, D 1 was purchased for railcar type service but it was not successful. It had a White-Forster type boiler designed for a working pressure of , had four vertical cylinders housed in the rear of the cab and was high geared. At a normal engine speed of 400 rpm, the unit was calculated to develop . The engine drove a central transverse jackshaft through reduction gearing, the drive from the jackshaft being transmitted to the wheel A wheel is a circular component that is intended to rotate on an axle Bearing (mechanical), bearing. The wheel is one of the key components of the wheel and axle which is one of the Simple machine, six simple machines. Wheels, in conjunction wi ...s through conventional side rods. Working Life On arrival in New Zealand, D 1 was found to be more than 25 percent heav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clayton Wagons Ltd
Clayton Wagons Ltd. of Lincoln, England, Lincoln were formed as a subsidiary company of Clayton & Shuttleworth in 1920. The company occupied the Abbey Works, Titanic Works and Clayton Forge. The company produced drop forgings, Steam Wagons, Electric Vehicles, Railway Carriages and Rolling stock. The main company, Clayton Shuttleworth, which was producing agricultural machinery, continued to operate from the Stamp End Works. Both companies found it very difficult to adapt to the post war economic situation and by 1923 Clayton and Shuttleworth's Eastern European trade had shrunk to 6% of its pre-War level. The firms struggled during the Great Depression and ceased trading on 18 February 1930. The Clayton Wagons premises came to be occupied by Clayton-Dewandre Ltd. and Smith-Clayton Forge Ltd. Company History Clayton and Shuttleworth had started manufacturing Steam wagon, Steam Motor Wagons in 1912. In 1917 during the 1st World War the Abbey Works and Clayton Forge were built, prima ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jackshaft (locomotive)
A jackshaft is an intermediate shaft used to transfer power from a powered shaft such as the output shaft of an engine or motor to driven shafts such as the drive axles of a locomotive. As applied to railroad locomotives in the 19th and 20th centuries, jackshafts were typically in line with the drive axles of locomotives and connected to them by side rods. In general, each drive axle on a locomotive is free to move about one inch (2.5 cm) vertically relative to the frame, with the locomotive weight carried on springs. This means that if the engine, motor or transmission is rigidly attached to the locomotive frame, it cannot be rigidly connected to the axle. This problem can be solved by mounting the jackshaft on unsprung bearings and using side-rods or (in some early examples) chain drives.General Construction, Baldwin Gasoline Industrial LocomotiveBaldwin Locomotive Works Record No. 74, 1913; pages 7-9. Jackshafts were first used in early steam locomotives, although the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scrapped Locomotives
Scrap consists of recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap has monetary value, especially recovered metals, and non-metallic materials are also recovered for recycling. Once collected, the materials are sorted into types — typically metal scrap will be crushed, shredded, and sorted using mechanical processes. Scrap recycling is important for creating a more sustainable economy or creating a circular economy, using significantly less energy and having far less environmental impact than producing metal from ore. Metal recycling, especially of structural steel, ships, used manufactured goods, such as vehicles and white goods, is a major industrial activity with complex networks of wrecking yards, sorting facilities and recycling plants. Processing Scrap metal originates both in business and residential environments. Typically a "scrapper" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Locomotives Of New Zealand
Steam is a substance containing water in the gas phase, and sometimes also an aerosol of liquid water droplets, or air. This may occur due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization. Steam that is saturated or superheated is invisible; however, "steam" often refers to wet steam, the visible mist or aerosol of water droplets formed as water vapor condenses. Water increases in volume by 1,700 times at standard temperature and pressure; this change in volume can be converted into mechanical work by steam engines such as reciprocating piston type engines and steam turbines, which are a sub-group of steam engines. Piston type steam engines played a central role in the Industrial Revolution and modern steam turbines are used to generate more than 80% of the world's electricity. If liquid water comes in contact with a very hot surface or depressurizes quickly below its vapor pressure, it can create a steam explosion. Types ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coupling Rod
A coupling rod or side rod connects the driving wheels of a locomotive. Steam locomotives in particular usually have them, but some diesel and electric locomotives, especially older ones and shunters, also have them. The coupling rods transfer the power of drive to all wheels. Development Locomotion No. 1 was the first locomotive to employ coupling rods rather than chains. In the 1930s reliable roller bearing coupling rods were developed. Allowance for vertical motion In general, all railroad vehicles have spring suspension; without springs, irregularities in the track could lift wheels off the rail and cause impact damage to both rails and vehicles. Driving wheels are typically mounted so that they have around 1 inch (2.5 cm) of vertical motion. When there are only 2 coupled axles, this range of motion places only slight stress on the crank pins. With more axles, however, provision must be made to allow each axle to move vertically independently of the others without be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheel
A wheel is a circular component that is intended to rotate on an axle Bearing (mechanical), bearing. The wheel is one of the key components of the wheel and axle which is one of the Simple machine, six simple machines. Wheels, in conjunction with axles, allow heavy objects to be moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Wheels are also used for other purposes, such as a ship's wheel, steering wheel, potter's wheel, and flywheel. Common examples are found in transport applications. A wheel reduces friction by facilitating motion by rolling together with the use of Axle, axles. In order for wheels to rotate, a Moment (physics), moment needs to be applied to the wheel about its axis, either by way of gravity or by the application of another external force or torque. Using the wheel, Sumer, Sumerians invented a device that spins clay as a potter shapes it into the desired object. Terminology The English word '':wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gear Ratio
A gear train is a mechanical system formed by mounting gears on a frame so the teeth of the gears engage. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. Features of gears and gear trains include: * The gear ratio of the pitch circles of mating gears defines the speed ratio and the mechanical advantage of the gear set. * A planetary gear train provides high gear reduction in a compact package. * It is possible to design gear teeth for gears that are non-circular, yet still transmit torque smoothly. * The speed ratios of chain and belt drives are computed in the same way as gear ratios. See bicycle gearing. The transmission of rotation between contacting toothed wheels can be traced back to the Antikythera mechanism of Greece and the south-pointing chariot of China. Illustrations by the Renaissance scientist Georgius Agricola show gear trains with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transverse Engine
A transverse engine is an engine mounted in a vehicle so that the engine's crankshaft axis is perpendicular to the direction of travel. Many modern front-wheel drive vehicles use this engine mounting configuration. Most rear-wheel drive vehicles use a longitudinal engine configuration, where the engine's crankshaft axis is parallel with the direction of travel, except for some Mid-engine design, rear-mid engine vehicles, which use a transverse engine and transaxle mounted in the rear instead of the front. Despite typically being used in light vehicles, it is not restricted to such designs and has also been used on Armoured fighting vehicle, armoured fighting vehicles to save interior space. History The Critchley Light car, Critchley light car, made by the Daimler Company, Daimler Motor Company in 1899, had a transverse engine with belt drive to the rear axle. The first successful transverse-engine cars were the two-cylinder DKW F1 series of cars, which first appeared in 1931. Du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silverstream
Silverstream is a suburb of Upper Hutt in New Zealand, just under 7 km south-west of the Upper Hutt CBD. It is in the lower (southern) part of the North Island of New Zealand at the southern end of Upper Hutt, close to the Taitā Gorge, which separates Upper Hutt from Lower Hutt. The area is sited at the mouth of a small valley formed by the Wellington Region's tectonic activity and, in part, by Hull's Creek, which discharges into the Hutt River. Demographics Silverstream statistical area covers . It had an estimated population of as of with a population density of people per km2. Silverstream had a population of 3,531 at the 2018 New Zealand census, an increase of 267 people (8.2%) since the 2013 census, and an increase of 210 people (6.3%) since the 2006 census. There were 1,266 households. There were 1,743 males and 1,791 females, giving a sex ratio of 0.97 males per female. The median age was 42.8 years (compared with 37.4 years nationally), with 693 people ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Revolutions Per Minute
Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionless unit equal to 1, which it refers to as a revolution, but does not define the revolution as a unit. It defines a unit of rotational frequency equal to s−1. The superseded standard ISO 80000-3:2006 did however state with reference to the unit name 'one', symbol '1', that "The special name revolution, symbol r, for this unit is widely used in specifications on rotating machines." The International System of Units (SI) does not recognize rpm as a unit, and defines the unit of frequency, Hz, as equal to s−1. :\begin 1~&\text &&=& 60~&\text \\ \frac~&\text &&=& 1~&\text \end A corresponding but distinct quantity for describing rotation is angular velocity, for which the SI unit is the ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-Forster Boiler
Three-drum boilers are a class of water-tube boiler used to generate steam, typically to power Steamship, ships. They are compact and of high evaporative power, factors that encourage this use. Other boiler designs may be more efficient, although bulkier, and so the three-drum pattern was rare as a land-based stationary boiler. The fundamental characteristic of the "three-drum" design is the arrangement of a steam drum above two Glossary of boiler terms#Water drum, water drums, in a triangular layout. Water tubes fill in the two sides of this triangle between the drums, and the Industrial furnace, furnace is in the centre. The whole assembly is then enclosed in a casing, leading to the exhaust flue. Firing can be by either coal or oil. Many coal-fired boilers used multiple Glossary of boiler terms#Firedoor, firedoors and teams of Fireman (steam engine), stokers, often from both ends. Development Development of the three-drum boiler began in the late 19th century, with the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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