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model engineering : ウィキペディア英語版
model engineering

Model engineering is the pursuit of constructing proportionally-scaled working representations of full-sized machines in miniature. 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.
Model engineering is most popular in the industrialised countries that have an engineering heritage extending back to the days of steam power. That is, it is a pursuit principally found in the UK, USA, northwestern European countries and the industrialised British Commonwealth countries.
==Scope of model engineering==
The 'classic' areas of model engineering interest are live steam models (typically steam locomotives, stationary engines and traction engines), internal combustion engines, and clock making. Other popular subjects are Stirling engines, workshop equipment, miniature machine tools and ornamental turning. These constitute stable genres which are often reflected in competition categories at model engineering exhibitions. In the past, amateur electrical experimentation (the precursor to hobby electronics) and ship modelling were considered as part of model engineering, but these are no longer regarded as core genres.
Model engineers typically make models by machining working parts from stock metal and metal castings. Some models are intended as utilitarian working models, others as highly meticulous display models, or sometimes a combination of both. The most elaborate models involve hand manufacture of thousands of parts, taking thousands of hours to complete, often over a number of years or even decades. The model engineer is often guided by commercially available drawings, however some draw their own designs, or even work without drawings. Similarly, most model engineers will buy castings when required, but some buy or make foundry equipment to cast metal themselves.
As an activity that involves extensive use of metalwork machine tools in a home workshop-based context, model engineering overlaps with other artisanal machine-tool based and allied metalwork pursuits including gunsmithing (particularly in the USA), manufacture of home metalworking tools and accessories, home cnc (computer numerical control) equipment building, antique machine tool collecting, antique vehicle and machine restoration, home welding and hobby metalcasting. Model engineering is closely associated with the hobby of running live steam locomotives, and overlaps to a degree with the making of non-working models, particularly those of mechanical subjects. Products such as ''Meccano'' and low-pressure toy steam engines have a loose affinity with model engineering. Steam Punk, a post-industrial sculptural art style picking up on the aesthetic and kinetic qualities of old machinery, shares some overlap.
There is some debate about the appropriateness of the term 'model engineering'. Some argue that the term 'engineer' should be reserved solely for those professionally qualified as such. However, the historic meaning of 'engineer' is one who constructs or tends engines, and as such is a fitting epithet for those who make working models as a hobby. In any case, since the term 'model engineer' was employed by 1888, the precedent for its use has long been a ''fait accompli''.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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