This website is the temporary home of the gwr4 materials. The gwr 101 class consisted of a single experimental 040 sidetank locomotive. Coloured postcards are often not a particularly reliable reference for colour schemes, but this delightful f moore example seems to be an exception, depicting bulldog stanley baldwin with its pre1912 number 3701 at paddington. The valve gear was the standard churchward adaptation of the stephenson link motion set between the frames, with the outside cylinders worked by rocker arms. Telling the different 460 loco classes apart is not always easy in photographs, especially for newcomers to the gwr. The basic king as built in 1927 carried a boiler pressure of 250 pounds per square inch, an advance of 25 pounds over swindons practice at the time, and had a driving wheel diameter of 6 feet 6 inches a reduction of 2. In 1844 egide walschaerts invented a valve gear that by 1848 appeared very much as it does today. Controversy surrounds withdrawal of gwr king king edward 11. A great western railway express locomotive built at swindon in 1907, and a forerunner of the famous castle and king class locomotives of the gwr. Technical detail specifications of steam locomotive 4003. I dont think they would have omitted the safety valve bonnet either. It was originally written as a part of his paxman history pages. Without doubt the star exhibit of swindons steam museum of the great western railway is the only surviving gwr star class locomotive, 4003 lode star.
The great western railway 3252 or duke class were 440 steam locomotives with outside. The king class were the ultimate development of the gwr fourcylinder 460 engines. Every external rivet location was measured from enlarged photographs of the full size loco. Simon of brookes castle has very kindly written the following blog post detailing the history of this locomotive, which has been illustrated with pictures taken at the museum by. Steam locomotive valve gear trains magazine trains.
The great western railway 2900 or saint class incorporated several series of 2cylinder passenger steam locomotives designed by george jackson churchward and built between 1902 and 19 with differences in the dimensions. The special classification was not shown on the king class, but in the case of no. The valve position is controlled by the drivers reversing lever in the cab. Gwr locomotive liveries from 1946 ian rathbone model. The great western railway 3200 class or earl class was a design of 440 steam locomotive for passenger train work. Its curious that the earlier inferior arrangement was retained on 5700 and 2251 classes. The following article is reproduced here with the kind permission of richard carr. I have made the software available by placing it in the public domain as freeware. The castles handled all but the heaviest loads, these being entrusted to the thirty strong king class modeled by aster in 1990. A history of lentz valve gear on british steam locomotives. Since then i have made continuous additions and improvements to add other types of valve gear and improve functionality and ease of use. Gwr 4 cylinder walschaerts valve gear animation duration.
They proved to be a successful design which handled the heaviest long distance. Primarily a place for newcomers to ask questions and seek assistance from likeminded individuals, the hornby forum offers a user community for all those interested in railways. Compared with the exceptionally good king class valve gear this little tank design gave the design team a. Four cylinders walschaerts valve gear total length 6 feet. One of the most wellliked and successful locomotives of the great western railway, the castle class, speeds into train simulator in gleaming br brunswick green liveries. The prototype locomotive was rebuilt as a member of the castle class in. The valve gear was an unusual design, called scissors gear, which. The caerphilly castlefirst of the castle class locomotives, the forerunners of the kings. The prototype was built as a 442 atlantic but converted to 460 during 1909. See don ashtons pages on stephenson valve gear for more on this subject. Steam engine valve gear on the computer windows version. Many of the star class locomotives were displaced to secondary operations while the new castle and kings reigned supreme, however the. There are good examples of walschaerts gear in a long travel context the gwr king and the immaculate outside gear of the bulleid rebuilds yet in general it could prove better practice to use a mildly increasing element at the valve end, where a dual hanger would serve admirably to. Steam engine valve gear on the computer downloadable freeware simulations of every kind of valve gear youve ever heard of by charles dockstader ca.
Modelers, please note that drawings are not to scale and are sized only to maintain clarity of dimensions shown within a. The gwr used the 460 wheel arrangement extensively from churchward onwards. Steam engine valve gear on the computer windows version by charles dockstader hcr 69 box 3111 california valley ca 93453 805 475 2519. All the working staff of the railway report to the gwsr, and are all unpaid volunteers who must in addition be current members of the gwrt. A selection of great western railway locomotive drawings. The inside gear of the gwr 4 cylinder 460s avoided this constriction to advantage. Heres a quick video showing how stephensons valve gear works on a grerat western hall. Buy gwr locomotives king class in o gauge from golden age models ltd, an ideal addition to your model trains collection. The valve gear, has been altered to give a longer travel of about 6 in to the piston valves in full gear. Modelers, please note that drawings are not to scale and are sized only to maintain clarity of dimensions shown within a practical drawing size. Any input or comments will be most welcome to help build up the definitive gwr loco livery guide. Great western locomotive liveries from 1946 revised 18. Considers that multiple sets of valve gear as fitted to a1 tornado produce far more even exhaust beat than any form of derived gear whether as adopted at swindon for castles and kings, by stanier on the duchess class, or by gresley.
Valve gear operation for a great western hall class locomotive. The four cylinders of the castles are 16 in diameter with a stroke of 26. Although the lner used a variety of different valve gears, it will forever be associated with gresleys conjugated valve gear. Noted extremely irregular behaviour on some king class which was highly indicative of overrun in the outside. Ten coaches have destination roof boards and two additional strengtheners or swingers without destination roof boards have been added to the train behind the tender. In 1986 i wrote the first of the msdos versions of the software to simulate baker valve gear. Gwr 3 software for geographically weighted regression. The print file has been produced by my son, using solidworks software. Steam locomotive valve gear trains magazine trains news.
Sep 02, 2017 heres a quick video showing how stephensons valve gear works on a grerat western hall class locomotive. This is a powerful reliable locomotive of exhibition standard. Stephensons link valve gear gwr hall 460 this kit is designed to accurately produce in 4mm scale a working model of the stephensons link valve gear. The tool van was constructed from a wep models kit but with modified springs and running gear from jltrt and the 1plank wagon from a coopercraft now slaters kit. Note the between cylinders valve gear and truetoprototype suspension. Gwr 460 identification guide great western railway. In early 1999 i started converting one of the valve gears to the windows format. The great western railway 2900 class or saint class was built by the great western railways swindon works. The 4000 express passenger class 460 locomotive 4003 lode star in york nrm. Below, john lewis provides a quick guide to help such photo identification. Unlike stephensons gear walschaerts is usually an outside application and may appear more familiar. This software is no longer supported, and its continued use is not recommended. Great western railway power and weight classification.
Star, knight, king, queen, prince, princess and abbey. Building gwr 5101 class tank loco,and a 5 gauge br standard class 2 tender loco. Back to barry story back to locomotives breakdown of the status of locomotives saved from woodham brothers ltd scrapyard at barry saved from barry restored to steam being restored used for parts scrapyard condition static exhibits gwr 98 65 22 7 3 1 sr 41. The four cylinders of the castles are 16 in diameter with a stroke of 26 in against the 16. Could there have been a gwr pacific apart from the great bear. How mighty are the kings railway wonders of the world. Inside walschaerts, piston valves, rocking levers for outside valves, cylinders of 6000 diameter x stroke. The great western railway gwr 6000 class or king class is a class of 460 steam. Reversing gear arrangements on some gwr locomotives. Sketches showing arrangements of stephenson valve gear on great western railway locomotives. Keep your locomotives looking good and on the move with our spares and accessories. The stephenson link motion is the gwr set applied to the two outside cylinder locomotives of several classes and is one of the finest of such applications. For reasons of practicality two significant deviations from the prototype have been made.
The great western railway gwr 6000 class or king class is a class of 460 steam locomotive designed for express passenger work and introduced in 1927. In 1937 a southern class v schools 900 eton was introduced, but because it was a much higher specification it was known as a series 4 a category occupied by the top of the range model introduced in the same year, princess elizabeth a 462, and their biggest one ever. Valve gear, inside walschaert with rocking shafts piston valve. Based on a gwr king in one of the versions of br blue, this locomotive has outside walschaerts valve gear and a bogie tender to accommodate the bogies, the tender is longer than usual. The lining styles and colour distribution are explained in the 1923 livery section. Enhance your model train set with our luxury locomotives and coaches.
The boiler is standard for the class, but it is fitted with the maunsell superheater, having header vacuum relief valves, ross safety valves, and a larger chimney. Gwr 4 cylinder walschaerts valve gear animation youtube. Wikimedia commons has media related to gwr 2900 class. Interactive footplate gloucestershire warwickshire railway. It also allows the driver to alter the length of steam admission, known as cutoff, and to reverse the locomotive.
Starter kits these are simple gluetogether kits with readyassembled chassis, designed for the newcomer to locomotive kit construction. Mar 18, 2014 an excellent youtube clip of a ride in the cab of a gwr king but can one of our gwr experts please explain exactly what lever the driver was struggling with on the early part of the run. Great western railway 460 60xx king class no 6007 king william iii with a twelve coach southbound express train in whitnash cutting, south of leamington in 1935. These are actually of the nominally collett 9300 class, but the layout is fundamentally similar on all the classes with two outside cylinders. Stay tuned for a new permanent home that is currently being built at arizona state university. Only the two remaining g1 class 280s and the four w6 080t tank engines retained their original slide valves and valve gear stephenson. The ztc gear was stripped out and put in a safe place though i shall.
The model is to 2mm scale and should accept either ngauge or fs wheels. The gloucestershire warwickshire steam railway plc gwsr operates the railway, which is owned by its shareholders. Against a background of increasing train sizes in the early 20th century, it was necessary to build locomotives that were more powerful and with a. Its style was bold and somewhat ostentatious which endeared it to many admirers throughout the world. The great western railway 4000 or star were a class of 4cylinder 460 passenger steam locomotives designed by george jackson churchward for the great western railway gwr in 1906. The great western railway took over the working of the cmr in 1877 and ownership in 1896. G model speedy an example of the difficulties attending compaction of the envelope is to be found in the gwr 1500 class 060 engines of which only 10 were made. The inside gear of the gwr 4cylinder 460s avoided this constriction to advantage. From its beginnings in 1835, britains great western railway followed its own course and made railway history. Wonders why hawksworth failed to modify class with four sets of valve gear justin, r. Chimney spark arrestor for 5700 class 060t gwr 1935. These are actually of the nominally collett 9300 class, but the layout is fundamentally similar on. The piston valves of the kings are actuated by the valve gear invented by the belgian engineer, walschaerts, of malines, and which now bears his name.
Prototype information great western railway malcolm. It was built at gwr swindon works under the direction of william deans chief engineer, james holden in. King arthur class valve gear replacement new railway. Compared with the exceptionally good king class valve gear this little tank design gave the design team a headache. This means that whilst improvements are continually being made they all exhibit a consistent level of detail and overall quality. The origins of this highly successful design date back to mr. This is meant as a quick guide only, for use with photographs. The great western railway 4000 or star were a class of 4cylinder 460 passenger steam. Gwr kits right from broad gauge days the gwr always went its own way in locomotive matters and, as this selection of kits reveals, this policy continued right until the end of locomotive building at swindon. Hi all, below are some screenshots of renderings of a saint class locomotive superstructure for 3d printing. Layout of stephenson gear on a churchward standard 2. These 4 cylinder 460s with long travel valves, and belpaire fireboxes were an immediate success on the gwrs toplink express duties to the west of england. The hornby forum is intended for discussion of all things model railways. Gwr 4 cylinder walschaerts valve gear animation, as used on the stars, castles and kings.
A coloured plate, showing a king class engine with part of the exterior cut away. The first 460 county class engine was completed in august 1945 and went into traffic in the prewar fully lined livery ie. Formatting has been adapted slightly to match that of the lner encyclopedia. Layout of stephenson gear on a churchward standard 2 cylinder. To avoid this the valve gear may have to be designed to have less or even negative lead when in full gear so that it does not become excessive at normal running cut offs. Some gwr valve gears are examples that have negative lead in full gear. In general our interests will range from learning what a gear does by watching a slow.
Cab run on a gwr king class locomotive model engineering. The function of the locomotive valve gear is to regulate the movement of the valves so that steam is admitted and exhausted from the cylinders in relation to the position of the pistons. For authoritative info on whistles and gear, what better than gwr swindon drg. Whether you require replacement spare parts for tired, wellloved locomotives or wish to add accessories such as smoke deflectors or sprung buffers to your existing rolling stock, we have a comprehensive range of products for your hornby train set. Together with a gwr king class at leek groningen 1995. Locomotives loaned during world war ii were given gwr power class letters, in order to avoid confusion with different systems used by the lending railway. Controversy surrounds withdrawal of gwr king king edward 11 at didcot after a 22 year restoration. Harbury cutting and tunnel great western railway 460. Software for gwr for fitting poisson, logistic and gaussian models, gwr3x, with a visual basic interface, used to be available from the ncg. Gwr locomotives king class o gauge golden age models. Against a background of increasing train sizes in the early 20th century, it was necessary to build locomotives that were more powerful and with a larger cylinder area. Safety valves model engineering suppliers walsall model. Originally designed by charles collett, chief mechanical engineer for the great western railway, the origins of the castle class were in the star class of 1907, which. Basic features of a steam locomotive great western.
Class 4500 steam locomotive 4566 was built at swindon works in 1924. Layout of stephenson gear on a churchward standard 2 cylinder locomotive click on the sketches to enlarge them. Feb 28, 2010 gwr 4 cylinder walschaerts valve gear animation, as used on the stars, castles and kings. The nickname for this class, almost universally used at the time these engines were in service was dukedog since the locomotives were composed of former duke class boilers on bulldog class frames. New king arthur locomotives railway wonders of the world. Layout of stephenson gear on a churchward standard 2 cylinder locomotive. They were the largest locomotives built by the gwr, apart from the unique pacific the great bear.
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