12-418: V4 or V-4 may refer to: Science and technology [ edit ] LNER Class V4 , a class of British steam locomotives V4 engine , a V engine with four cylinders in two banks of two cylinders Visual area V4 , in the visual cortex Klein four-group , in mathematics ITU-T V.4 , a telecommunication recommendation ATC code V04 Diagnostic agents ,
24-482: A German World War II four-stage missile Saint Kitts & Nevis (ITU prefix) Vieques Air Link (IATA airline code) V4, a grade (climbing) for difficulty of a boulder climbing route See also [ edit ] 4V (disambiguation) [REDACTED] Topics referred to by the same term This disambiguation page lists articles associated with the same title formed as a letter–number combination. If an internal link led you here, you may wish to change
36-530: A group in the 1990s who planned to build a V4), a chimney, and the speedometer drives from a British Rail Class 08 . In October of 2022, the A1 Steam Locomotive Trust announced that No. 3403 will be named Highlander . Thermic syphon Thermic siphons (alt. thermic syphons ) are heat-exchanging elements in the firebox or combustion chamber of some steam boiler and steam locomotive designs. As they are directly exposed to
48-521: A new V4 which will be number 3403 (61702) Anon. On the 6th of September, 2018, the A1 Trust officially announced that it had started the pre-launch stage for project, with a projected cost of £3 million, and an estimated starting date of 2021. The project is estimated to take around 5 years. There are already parts for the V4 at Darlington Locomotive Works, including a complete set of tyres (originally made for
60-614: A single thermic syphon for water circulation. It was not named, but was known unofficially as "Bantam Hen". The type had more power than the existing B17s and better riding qualities. It was anticipated that many more would be produced, but after the death of Gresley and his succession by Edward Thompson , no more were built. Instead, the LNER Thompson Class B1 was adopted as the LNER's standard mixed-traffic locomotive. The two locomotives were sent to Scotland for use on
72-611: A subgroup of the Anatomical Therapeutic Chemical Classification System The V4 JavaScript engine for QML V 4 , one of six precordial leads in electrocardiography V-4 (rocket launch) , first mostly-successful launch of the V-2 rocket Other uses [ edit ] Visegrád Group , an alliance of four Central European states - Czech Republic, Hungary, Poland and Slovakia Rheinbote or V-4,
84-472: A syphon was justified by the need for a compact and lightweight means of increasing boiler capacity. One of the best-known forms for locomotives was invented by the English locomotive engineer John L. Nicholson who received a US patent. The Nicholson form combined a complex shape that provided more heating area in a given space than did the earlier tubes and funnels, yet was simple to make, being folded from
96-647: The West Highland Line , although their wheel arrangement was not particularly suitable for the steep gradients on the line. They were renumbered 1700 and 1701 in 1946, and later became British Railways 61700 and 61701. Both were scrapped in 1957 when their boilers became due for renewal. At the A1 Steam Locomotive Trust Silver Jubilee Convention, it was announced that after the completion of no. 2007 "Prince of Wales" , they would begin construction on
108-409: The radiant heat of combustion, they have a high evaporative capacity relative to their size. By arranging them near-vertically, they also have good water circulation by means of the thermosyphon effect. The concept of a self-circulating thermic syphon began with stationary boilers and relatively simple Galloway tubes . They reached their peak in steam locomotive boilers , where the complexity of
120-432: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=V4&oldid=1211017637 " Category : Letter–number combination disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages LNER Class V4 The London and North Eastern Railway Class V4
132-490: The whole of the LNER network. Two locomotives were built at the LNER's Doncaster Works in 1941. The first engine, 3401 Bantam Cock , had a scaled-down version of the Gresley Pacific boiler with a grate area of 28.5 sq ft. Its tractive effort of 27,000 lbs was produced by boiler pressure of 250 psi and three cylinders of 15-inch diameter. The second locomotive, 3402, incorporated a fully welded steel firebox and
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#1732765781961144-480: Was a class of 2-6-2 steam locomotive designed by Sir Nigel Gresley for mixed-traffic use. It was Gresley's last design for the LNER before he died in 1941. The V4s had similarities in their appearance and mechanical layout to the V2 "Green Arrow" class. The V2s, introduced some years before, were large and heavy locomotives, with very limited route availability. The V4 was a lightweight alternative, suitable for use over
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