Live steam is steam under pressure, obtained by heating water in a boiler. The steam may be used to operate stationary or moving equipment.
A live steam machine or device is one powered by steam, but the term is usually reserved for those that are replicas, scale models, toys, or otherwise used for heritage, museum, entertainment, or recreational purposes, to distinguish them from similar devices powered by electricity, internal combustion, or some other more convenient method but designed to look as if they are steam-powered. Revenue-earning steam-powered machines such as mainline and narrow gauge steam locomotives, full-sized steamships, and the worldwide electric power-generating industry steam turbines are not normally referred to as "live steam".
Steamrollers and traction engines are popular, in 1:4 or 1:3 scale, as are model stationary steam engines, ranging from pocket-size to 1:2 scale.
Ridable, large-scale live steam railroading on a backyard railroad is a popular aspect of the live steam hobby, but it is time-consuming to build a locomotive from scratch and it can be costly to purchase one already built. Garden railways, in smaller scales (that cannot pull a "live" person nor be ridden on), offer the benefits of real steam engines (and at lower cost and in less space), but do not provide the same experience as operating one's own locomotive in the larger scales and riding on (or behind) it, while doing so.
One of the most famous live steam railroads was Walt Disney's Carolwood Pacific Railroad around his California home; it later inspired Walt Disney to surround his planned Disneyland amusement park with a working, narrow gauge railroad.
The live steam hobby is especially popular in the UK, US, New Zealand, Australia, and Japan. All over the world, there are hundreds of clubs and associations as well as many thousands of private backyard railroads. The world's largest live steam layout, with over 25 miles (40 km) of 7+1⁄2 in (190.5 mm) trackage is Train Mountain Railroad [1] in Chiloquin, Oregon. Other notable layouts are operated by the Los Angeles Live Steamers Railroad Museum and the Riverside Live Steamers.
A live steam locomotive is often an exact, hand-crafted scale model. Live steam railroad scales are generally referred to by the number of inches of scale per foot. For example, a 1:8 scale locomotive will often be referred to as a 1½" scale locomotive. Common modelling scales are Gauge 1 (1:32 scale), 1/2" (1:24 scale), 3/4" (1:16), 1" (1:12), 1½" (1:8), 2½" (~1:5) and 3" (1:4).
Track gauge refers to the distance between the rails. The ridable track gauges range from 2+1⁄2 in (64 mm) to 15 in (381 mm), the most popular being 3+1⁄2 in (89 mm), 4+3⁄4 in (121 mm), 5 in (127 mm), 7+1⁄4 in (184 mm) and 7+1⁄2 in (190.5 mm) (see Rail transport modelling scales). Some live steam club layouts use dual or even triple gauge tracks. Gauges from 10 in (254 mm) and up are called "Miniature Railways" (in the US these are known as "Grand Scale Railroads"), and are used mostly in amusement park rides and commercial settings.
Often the gauge has little to do with the scale of a locomotive since larger equipment can be built in a narrow gauge railway configuration. For instance, scales of 1.5, 1.6, 2.5, and 3 inches per foot (corresponding to scales of 1:8 to 1:4) have been used on a 7+1⁄2 in (190.5 mm) track gauge.
The generally accepted smallest gauge for a live steam locomotive is O scale. Producing smaller-scale models remains problematic, as the laws of physics do not themselves scale: creating a small-scale boiler that produces useful quantities of steam requires careful engineering. Hornby Railways has produced commercial live steam-powered locomotives in OO scale by utilising an electrically heated boiler mounted in the tender, with cylinders in the locomotive, and control provided by electrical signals fed through the track from a remote control unit. They are less mechanically realistic than models in larger scales; the visible valve gear is a dummy, as on the electric-motor-powered models, and steam admission to the cylinders is controlled by a rotary-valve servo inside the boiler casing, which is also a dummy. Nevertheless, the locomotive is driven by steam that is created on board the locomotive and is hence a genuine steam locomotive.
It is technically possible to build even smaller operating steam engines. Hand-made examples, as small as Z scale (1:220), with a gauge of only 6.5 mm (0.256 in), have been produced. [2] These are fired with a butane flame from a burner in the engine's tender. AA Sherwood of Australia, an engineering lecturer, produced some miniature scale model live steam engines in the late 1960s and early 1970s. His smallest live steam engines were 1:240 scale which is smaller than the 1:220 of Z Scale. [3] The smallest scale Sherwood worked in was 1:480, though that was not live steam.
A wide variety of boiler designs are available, ranging from simple externally fired pot boilers to sophisticated multi-flue internally fired boilers and even superheater boilers usually found only on larger, more complex models.
For basic locomotive models, a simple valve gear can be used, with the reversing (if any) performed by a valve, or by using a "slip" eccentric.
More complex locomotive models can use valve gear similar to real steam machine with the reversing done mechanically, most frequently the Walschaerts type.
There are several common fuels used to boil water in live steam models:
Live steam road vehicles are popular with model engineers because they are not restricted to running on tracks or water and can be easily transported to rallies and exhibitions. They include traction engines & steam rollers, showman's engines, wagons, cars, road-making & agricultural machines, often seen with ancillary equipment like threshing machines.
Most types of boats and ships that were powered by steam in real life can be found as live steam ship models. These include, amongst others, speed boats, launches, tugboats, ocean liners, warships, paddle steamers and freight carriers. A specialized type is the tethered hydroplane. [4] When steam-powered, these often have flash boilers.
Stationary engines tend to be less popular with modelers than mobile engines; probably because they are less easily transportable. They are more popular with toy makers. They can be anything from small farm engines to winding engines and mill engines.
In the late 19th and early-mid 20th centuries, live steam toys were extremely popular, with some large manufacturers like Bing selling hundreds of different models in large quantities. There were very many smaller manufacturers all over the world. Some of these, like Mamod, Wilesco and Jensen, are still in business making live steam toys, although they are now mainly marketed as collectables and novelties rather than toys. Toys tend to be less accurate representations of real life equipment than are models and many are somewhat generic in nature. The range includes all those seen as models and some of a purely novelty kind.
A live steam festival (often called a "Steam Fair" in the UK and a live steam "meet" in the US) is a gathering of people interested in steam engine technology. Locomotives, trains, traction engines, steam wagons, steam rollers, showman's engines and tractors, steam boats and cars, and stationary steam engines may be on display, both full-sized and in miniature. Rides may also be offered.
There are several magazines devoted to the live steam hobby:
"Model Engineer" is an English publication that is published twice a month and was founded in 1898. Most locomotive articles have an "English" flavour popular in the UK, Australia, New Zealand and South Africa. The magazine is aimed at constructors but also covers non-steam and non-rail model engineering interests.
"Live Steam & Outdoor Railroading" is a U.S. magazine, founded in 1966 and devoted to the live steam hobby, as well as to other uses of miniature and full-size steam. Originally, it was a mimeographed newsletter, but soon expanded into magazine format. In 2005, the name was changed from "Live Steam". It is currently published bi-monthly, with a press run of slightly over 10,000 (Dec. 2004).
The now-defunct publication (launched in 2006), was "The Home Railway Journal". [5] which was specifically aimed at enthusiasts with ride-on railways (although not just steam-powered) in North America. It was published quarterly in Sacramento, California, US.
Railway modelling or model railroading is a hobby in which rail transport systems are modelled at a reduced scale.
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material to heat water in the locomotive's boiler to the point where it becomes gaseous and its volume increases 1,700 times. Functionally, it is a steam engine on wheels.
A scale model is a physical model that is geometrically similar to an object. Scale models are generally smaller than large prototypes such as vehicles, buildings, or people; but may be larger than small prototypes such as anatomical structures or subatomic particles. Models built to the same scale as the prototype are called mockups.
A Fairlie locomotive is a type of articulated steam locomotive that has the driving wheels on bogies. The locomotive may be double-ended or single ended. Most double-ended Fairlies had wheel arrangements of 0-4-4-0T or 0-6-6-0T.
A tank locomotive is a steam locomotive which carries its water in one or more on-board water tanks, instead of a more traditional tender. Most tank engines also have bunkers to hold fuel; in a tender-tank locomotive a tender holds some or all of the fuel, and may hold some water also.
O scale is a scale commonly used for toy trains and rail transport modelling. Introduced by German toy manufacturer Märklin around 1900, by the 1930s three-rail alternating current O gauge was the most common model railroad scale in the United States and remained so until the early 1960s. In Europe, its popularity declined before World War II due to the introduction of smaller scales.
1 gauge, gauge 1 or gauge one is a model railway and toy train standard that was popular in the early 20th century, particularly with European manufacturers. Its track measures 1.75 in, making it larger than 0 gauge but slightly smaller than wide gauge, which came to be the dominant U.S. standard during the 1920s.
Main components found on a typical steam locomotive include:
Model engineering is the pursuit of constructing proportionally-scaled miniature working representations of full-sized machines. It is a branch of metalworking with a strong emphasis on artisanry, as opposed to mass production. While now mainly a hobby, in the past it also had commercial and industrial purpose. The term 'model engineering' was in use by 1888. In the United States, the term 'home shop machinist' is often used instead, although arguably the scope of this term is broader.
A garden railway or garden railroad is a model railway system set up outdoors in a garden. While G is the most popular scale for garden railroads, 16 mm scale has a dedicated and growing following especially in the UK. Model locomotives in this scale are often live steam scale models of British narrow gauge prototypes. 16 mm scale track, the same gauge as O gauge is probably now more popular in the UK than G scale.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, a 2-6-6-2 is a locomotive with one pair of unpowered leading wheels, followed by two sets of three pairs of powered driving wheels and one pair of trailing wheels. The wheel arrangement was principally used on Mallet-type articulated locomotives, although some tank locomotive examples were also built. A Garratt locomotive or Golwé locomotive with the same wheel arrangement is designated 2-6-0+0-6-2 since both engine units are pivoting.
A backyard railroad is a privately owned, outdoor railroad, most often in miniature, but large enough for one or several persons to ride on. The rail gauge can be anything from 2+1⁄2 in to 7+1⁄2 in or more. Smaller backyard or outdoor railroads that cannot be ridden are called garden railroads. Some backyard railroads use full-size rolling stock, such as the former 3 ft narrow gauge Grizzly Flats Railroad owned by railfan and Disney animator Ward Kimball.
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W. G. Bagnall was a locomotive manufacturer from Stafford, England which was founded in 1875 and operated until it was taken over in 1962 by English Electric.
Minimum-gauge railways refer to railways with track gauges smaller than those of narrow-gauge railways, primarily designed for light, industrial, or tourist transportation. The most common gauges for minimum-gauge railways include:
The New York Central Railroad's Niagara was a class of 27 4-8-4 steam locomotives built by the American Locomotive Company for the New York Central Railroad. Like many railroads that adopted different names for their 4-8-4s rather than “Northerns”, the New York Central named them “Niagaras”, after the Niagara River and Falls. It is considered as one of the most efficient 4-8-4 locomotives ever built.
Lillian "Curly" Lawrence, known as LBSC, was one of Britain's most prolific and well known model or scale-steam-locomotive designers. LBSC were the initials of Britain's London, Brighton and South Coast Railway, where he was once employed as a fireman.
Wilesco is the trade name of German toy company Wilhelm Schröder GmbH & Co. KG, known for manufacturing live steam toys such as steamrollers, traction engines, stationary steam engines, and numerous accessories such as countershafts and drive models.
A steam motor is a form of steam engine used for light locomotives and light self-propelled motor cars used on railways. The origins of steam motor cars for railways go back to at least the 1850s, if not earlier, as experimental economizations for railways or railroads with marginal budgets. These first examples, at least in North America, appear to have been fitted with light reciprocating engines, and either direct or geared drives, or geared-endless chain drives. Most incorporated a passenger carrying coach attached to the engine and its boiler. Boiler types varied in these earlier examples, with vertical boilers dominant in the first decade and then with very small diameter horizontal boilers. Other examples of steam motor cars incorporated an express-baggage or luggage type car body, with coupling apparatus provided to allow the steam motor car to draw a light passenger coach.
The Miniature Railway Company on Broadway in Manhattan, New York, operated their ridable miniature railways at four World Expositions around 1900 and delivered them to many parks throughout the world.