| 词条 | Maine Central class W 2-8-0 |
| 释义 |
|name = Maine Central class W |powertype = Steam |image = |caption = |hatnote = Reference:[1] |builder = ALCO |builddate = 1910–1914 |totalproduction = 28 |retiredate = 1954 |whytetype = 2-8-0 |uicclass = 1'D |gauge = {{track gauge|ussg}} |leadingdiameter = {{convert|33|in|mm|0|abbr=on}} |driverdiameter = {{convert|63|in|mm|0|abbr=on}} |trailingdiameter = |wheelbase = {{convert|25|ft|6|in|m|2|abbr=on}} |length = {{convert|71|ft|4|in|m|2|abbr=on}} including tender |width = |height = {{convert|14|ft|8+1/4|in|m|2|abbr=on}} |weightondrivers = |locoweight = {{convert|198000|lb|t|1|abbr=in}} |locotenderweight = {{convert|338000|lb|t|1|abbr=in}} |fueltype = Coal |fuelcap = 12 t |watercap = {{convert|7000|USgal|m3|0|abbr=on}} |boilerpressure = {{convert|185|lb/in2|kg/cm2|abbr=on}} |firearea = {{convert|50.2|sqft|m2|2|abbr=on}} |tubesandflues = |fireboxarea = |totalsurface = |superheaterarea = |cylindercount = Two |cylindersize = {{convert|23|x|28|in|mm|0|abbr=on}} |valvegear = Walschaerts |tractiveeffort = {{convert|37000|lbf|kN|1|abbr=on}} |factorofadhesion = }}Maine Central Railroad Class W locomotives were intended for heavy freight service. They were of 2-8-0 wheel arrangement in the Whyte notation, or "1'D" in UIC classification. They replaced earlier class O 4-6-0 locomotives beginning in 1910. They were in turn replaced by class S 2-8-2 locomotives for the heaviest freight service beginning in 1914, but remained in use on lighter freight trains until replaced by diesel locomotives after World War II.[1] Sub-classesAll were built in American Locomotive Company's plant at Schenectady, New York. The first nine built in 1910 (builders numbers 47732-47736 & 49207-49210) were {{convert|5000|lb|kg}} lighter than the infobox figure. Sub-class W-1 consisted of seven locomotives added in 1912 (builders numbers 50933-50939) and eight more (builders numbers 52989-52996) delivered in 1913. The last four designated sub-class W-2 (builders numbers 54564-54567) were delivered in 1914 and were {{convert|4000|lb|kg}} heavier than the infobox figure.[1] PreservationClass W locomotives were numbered from 501 to 528 as delivered. Numbers 501 and 519 were officially property of the European and North American Railway (E&NA) as a condition of the lease of that company by the Maine Central Railroad. They therefore avoided scrapping until Maine Central purchased E&NA to remove the lease obligation in 1955. The locomotives were then sold to railfans, and have been preserved at Conway Scenic Railroad and Steamtown National Historic Site, respectively.[2] ReplacementWhen the Maine Central began purchasing diesel locomotives, road switchers were numbered in the 500 series previously reserved for the W class.[3] ALCO RS-2s and ALCO RS-3s were numbered 551 through 557, and EMD GP7s were numbered 561 through 569 and 571 through 581.[4] References1. ^1 2 {{cite book| last=Robertson| first=Edwin B.| title=Maine Central Steam Locomotives| publisher=Edwin B. Robertson| year=1977| location=Westbrook, Maine| pages=44-47}} {{Maine Central}}2. ^{{cite web|url=http://www.nps.gov/stea/planyourvisit/upload/mc519.pdf|title=Pictures of MEC 519|publisher=National Park Service|accessdate=2013-03-03}} 3. ^{{cite book| title=Maine Central in Color Volume 2 |last1=Plant| first1=Jeremy F.| last2=Melvin| first2=George F. |lastauthoramp=yes |publisher=Morning Sun Books |year=1999 |isbn=1-58248-030-3 |page=70}} 4. ^{{cite book| title=Maine Central Diesel Locomotives | last=Robertson| first=Edwin B. |publisher=Edwin B. Robertson |year=1978|pages=35, 41 & 49}} 6 : 2-8-0 locomotives|ALCO locomotives|Maine Central Railroad locomotives|Railway locomotives introduced in 1910|Freight locomotives|Standard gauge locomotives of the United States |
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