Locomotive Frame 1s4c6y

Locomotive frame 1.1 Plate frames These used steel plates about 1–2 in (25.4–50.8 mm) thick. They were mainly used in Britain and continental Europe. On most locomotives the frames would be situated within the driving wheels (“inside frames”), but some classes of early steam locomotive and diesel shunters were constructed with “outside frames”. Some early designs were double framed where the frame consisted of plates both inside and outside the driving wheels. Others were sandwich frames where the frame was constructed of Locomotive frame of a LNER Gresley pacific locomotive during wood sandwiched between two metal plates. construction

A locomotive frame is the structure that forms the back- 1.2 bone of the railway locomotive, giving it strength and ing the superstructure elements such as a cab, boiler or bodywork. The vast majority of locomotives have had a frame structure of some kind. The frame may in turn be ed by axles directly attached to it, or it may be mounted on bogies (UK) / trucks (US), or a combination of the two. The bogies in turn will have frames of their own.

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Bar frames

Types of frame

Bar frames of a WAGR U class locomotive

These were made of two steel bars which are usually 4– 7 in (101.6–177.8 mm) thick. They were first used on the Bury Bar Frame locomotive during the 1830s, and were widely used in the USA throughout the nineteenth century.

1.3 Cast steel beds Main article: Locomotive bed Preserved GWR 9017 showing outside frames

Cast steel locomotive beds were a development of the final years of steam locomotive design in the United States. Three main types of frame on steam locomotives may be They were also exported to Britain and Australia from the distinguished:[1] USA. 1

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Articulated locomotives

Main article Articulated locomotive An articulated locomotive with no fixed wheels (i.e. excluding the Mallet locomotive but including other articulated steam locomotives, as well as most diesel and electric locomotives) may have a separate frame beneath the superstructure, or the bodywork’s internal structure may be load-bearing. Rarely is a true monocoque structure used. Diesel and electric locomotives with a traditional, fullwidth body, known as cab units in North America, tend to have their strength in an internal structure. This style of construction is still popular elsewhere, but North American locomotives nowadays are overwhelmingly hood units—with a strong frame beneath the superstructure that carries all the load, and bodywork made of removable s for easy maintenance. Fully enclosed locomotives are used in some limited applications, mostly for enger trains. These tend to be cowl units, in which the body is not load-bearing.

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See also • Chassis • Locomotive bed • Steam locomotive components • Underframe

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References

[1] Ransome-Wallis, P. (1959). Illustrated Encyclopedia of World Railway Locomotives (2001 republication ed.). Dover Publications, Inc. ISBN 0-486-41247-4., p 255.

REFERENCES

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Text and image sources, contributors, and licenses

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Text

• Locomotive frame Source: https://en.wikipedia.org/wiki/Locomotive_frame?oldid=637282278 Contributors: CesarB, Morven, Slambo, Gurch, Hellbus, Das48, Peter Horn, Ning-ning, Robertgreer, Andy Dingley, Biscuittin, Bermicourt, Yobot, Prari, Redrose64, Bahnfrend and Anonymous: 4

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Images

• File:Bar_frames_U_class_locomotive_WAGR.jpg Source: locomotive_WAGR.jpg License: CC-BY-SA-3.0 Contributors: photographed at Bassendean railway museum Original artist: Ning-ning

https://.wikimedia.org/wikipedia/en/7/76/Bar_frames_U_class_

• File:Dukedog.jpg Source: https://.wikimedia.org/wikipedia/commons/f/fe/Dukedog.jpg License: CC BY-SA 3.0 Contributors: Own work Original artist: Das48 • File:Frames_in_position,_Pacific_construction_at_Doncaster_works_(CJ_Allen,_Steel_Highway,_1928).jpg Source: https://.wikimedia.org/wikipedia/commons/d/d2/Frames_in_position%2C_Pacific_construction_at_Doncaster_works_%28CJ_ Allen%2C_Steel_Highway%2C_1928%29.jpg License: Public domain Contributors: Scan from Allen, Cecil J. (1928) The Steel Highway, London: Longmans, Green & Co., pp. facing page. (II) 5 Original artist: Andy Dingley (scanner) • File:Icon_train.svg Source: https://.wikimedia.org/wikipedia/commons/7/78/Icon_train.svg License: Public domain Contributors: Originally from en.wikipedia; description page is/was here. Original artist: The original er was Richtom80 at English Wikipedia

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Content license

• Creative Commons Attribution-Share Alike 3.0