{{Short description|Japanese diesel-electric multiple unit train type}} {{Use dmy dates|date=November 2021}} {{Infobox train | name = DEC741 | image = JRW DEC741 2021-11-02.jpg | caption = A DEC741 train in November 2021 | replaced = [[KuMoYa 443]] | manufacturer = [[Kinki Sharyo]] | yearconstruction = 2021 | numberbuilt = 2 vehicles (1 set) | formation = 2 cars | operator = [[JR West]] | carbody = Steel | carlength = {{Convert|21|m|ftin|abbr=on}} | width = {{Convert|2.8|m|ftin|abbr=on}} | maxspeed = {{convert|100|km/h|mph|abbr=on}} | gauge = {{Track gauge|1067mm}} | fleetnumbers = E1<ref name="hobidas dec741"/> | bogies = WDT71 (motored bogie)<ref name="hobidas dec741">{{Cite web|date=2021-10-27 |title=JR西日本、総合検測車DEC741形、報道公開！ |trans-title=JR West unveils general inspection DEC741 train, press release! |url=https://rail.hobidas.com/feature/347125/ |access-date=2021-12-10 |website=鉄道ホビダス}}</ref> }} The '''DEC741'''<!--{{Nihongo|'''DEC741'''|DEC741形|format=yes}}--> is a [[diesel-electric multiple unit]] (DMU) [[work train|departmental train]] operated by [[West Japan Railway Company]] (JR West). It is Japan's first route inspection train to incorporate [[artificial intelligence]].
== Overview == Details of the DEC741 were announced on 27 October 2021. The train incorporates [[artificial intelligence]] (AI), being the first route inspection train in Japan to do so;<ref name=":1">{{Cite web|date=2021-10-27 |title=JR西日本，総合検測車DEC741形を導入 |trans-title=JR West introduces DEC741 rail inspection vehicle |url=https://railf.jp/news/2021/10/27/175000.html |access-date=2022-11-30 |website=Japan Railfan Magazine Online |publisher=Koyusha Co., Ltd. |location=Japan |language=ja}}</ref> it is scheduled to begin commercial operation in 2025,<ref name="dec741 engl" /> replacing the [[KuMoYa 443]] [[Multi-system (rail)|dual-voltage]] electric multiple unit.<ref name=":1" /> [[JR West]] intends to use AI as a means to cover labor shortages, which is a growing issue for the railway industry.<ref name="dec741 engl">{{Cite news|date=2021-10-29 |title=JR West to roll out Japan's 1st AI inspection train on ordinary lines in FY2025 |url=https://mainichi.jp/english/articles/20211029/p2a/00m/0bu/036000c |access-date=2021-11-14 |website=Mainichi Daily News |language=en}}</ref>
The DEC741 is able to run on the entirety of the JR West conventional line network. It will also be able to run on and inspect rail networks from other operators, including the [[JR Kyushu]] and [[JR Shikoku]] networks, the [[IR Ishikawa Railway]], and the [[Echigo Tokimeki Railway]].<ref name=":1" />
== Design == The body and underframe are made of steel.<ref name="dec741 material">{{Cite web|date=2021-10-27|title=JR西日本の「DEC741」登場 屋根上に大量のカメラを搭載 - 鉄道コム|trans-title=JR West's DEC741 equipped with a large amount of roof-mounted cameras|url=https://www.tetsudo.com/report/347/|url-status=live|access-date=2021-11-14|website=tetsudo.com|language=ja-JP|archive-url=https://web.archive.org/web/20211027050644/https://www.tetsudo.com/report/347/ |archive-date=27 October 2021 }}</ref> Each car is {{Convert|21|m|ftin|abbr=off}} long<ref name=":0">{{Cite web|date=2021-10-27|title=JR西日本「DEC741」公開! 総合検測車の新型車両を導入 - 写真53枚|trans-title=JR West "DEC741" released! Introducing a new type of comprehensive inspection vehicle – 53 photos|url=https://news.mynavi.jp/article/20211027-dec741/|url-status=live|access-date=2021-11-16|website=Mynavi News|language=ja|archive-url=https://web.archive.org/web/20211027054125/https://news.mynavi.jp/article/20211027-dec741/ |archive-date=27 October 2021 }}</ref> and {{Convert|2.8|m|ftin|abbr=off}} wide.<ref name="dec741 material" /> The train type has a maximum speed of {{Convert|100|km/h}}.<ref name="dec741 engl" />
=== Livery === The DEC741 series carries a livery with a blue base and a yellow stripe, which makes the train more visible at night.<ref name="dec741 engl" />
=== Equipment === The trainset is equipped with 64 cameras, 44 infrared lights for nighttime use,<ref name="dec741 engl" /> and a diamond-shaped [[Pantograph (transport)|pantograph]] to inspect overhead wires.<ref name="dec741 material" /> It also uses the same traction system as the [[DEC700]] railcar.<ref name=":1" />
== Formation == {| class="wikitable" style="text-align:center" ! Car No. !! 1 !! 2 |- ! Designation | '''DEC741-1'''<br/>(Mzc) || '''DEC741-101'''<br/>(Tzc) |- <!-- ! Wheel arrangement | ●● ●● || ○○ ○○ --> |} DEC741-1 has 50 roof-mounted cameras.<ref name="dec741 material" /> DEC741-101 is equipped with a diamond-shaped pantograph.<ref name=":0" />
== References == {{Reflist}}
== External links == {{Commons category}}
* [https://www.westjr.co.jp/press/article/items/211027_03_dec.pdf Press release] (in Japanese) {{JR West rolling stock}}
[[Category:Diesel multiple units of Japan]] [[Category:Non-passenger multiple units]] [[Category:Kinki Sharyo multiple units]] [[Category:Train-related introductions in 2021]] [[Category:Track recording trains]]
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