About: Southern Pacific class AM-2

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Southern Pacific Company's AM-2 class of steam locomotives was Southern Pacific's (SP) only class of 4-6-6-2 locomotives ordered and built as cab forward locomotives. They were actually MM-2s that had been upgraded. MM-2s were built in 1911 by Baldwin Locomotive Works and entered service on SP beginning September 19, 1911. By 1914, they had all been upgraded with an additional leading axle making them 4-6-6-2 locomotives. They reclassified their MM-2 as AM-2. This was done to improve handling at speed. These locomotives were the predecessors of the AC-12 class cab forward locomotives built during World War II.

Attributes	Values
rdf:type	Thing schema:Product mean of transportation Locomotive yago:WikicatBaldwinLocomotives animal yago:WikicatMalletLocomotives yago:WikicatScrappedLocomotives yago:WikicatSouthernPacificRailroadLocomotives yago:WikicatSteamLocomotivesOfTheUnitedStates yago:Artifact100021939 yago:Container103094503 yago:Conveyance103100490 yago:Instrumentality103575240 yago:Locomotive103684823 yago:Object100002684 yago:PhysicalEntity100001930 locomotive yago:Self-propelledVehicle104170037 yago:SteamLocomotive104310018 yago:Vehicle104524313 yago:WheeledVehicle104576211 yago:Whole100003553 yago:Wikicat4-6-6-2Locomotives yago:WikicatRailwayLocomotivesIntroducedIn1911
rdfs:label	Southern Pacific class AM-2 (en)
rdfs:comment	Southern Pacific Company's AM-2 class of steam locomotives was Southern Pacific's (SP) only class of 4-6-6-2 locomotives ordered and built as cab forward locomotives. They were actually MM-2s that had been upgraded. MM-2s were built in 1911 by Baldwin Locomotive Works and entered service on SP beginning September 19, 1911. By 1914, they had all been upgraded with an additional leading axle making them 4-6-6-2 locomotives. They reclassified their MM-2 as AM-2. This was done to improve handling at speed. These locomotives were the predecessors of the AC-12 class cab forward locomotives built during World War II. (en)
foaf:name	Southern Pacific class MM-2 (en)
name	Southern Pacific class MM-2 (en)
dcterms:subject	Baldwin locomotives 4-6-6-2 locomotives Standard gauge locomotives of the United States Mallet locomotives Railway locomotives introduced in 1911 Scrapped locomotives Steam locomotives of the United States Southern Pacific Railroad locomotives
Wikipage page ID	36952411 (xsd:integer)
Wikipage revision ID	1056754858 (xsd:integer)
Link from a Wikipage to another Wikipage	Baldwin locomotives Sacramento, California Sierra Nevada Steam locomotive Feedwater heater Baldwin Locomotive Works Walschaerts valve gear 4-6-6-2 4-6-6-2 locomotives Standard gauge locomotives of the United States Mallet locomotives Railway locomotives introduced in 1911 Scrapped locomotives Steam locomotives of the United States Southern Pacific Railroad locomotives Cab forward Southern Pacific class AC-12 Southern Pacific class MM-2 Oregon Mallet locomotive Tractive effort Southern Pacific Company Leading wheels
sameAs	Southern Pacific class AM-2 Southern Pacific class AM-2 Southern Pacific class AM-2 Southern Pacific class AM-2
superheatertype	None (en)
dbp:wikiPageUsesTemplate	dbt:SP_cab_forward_locomotives dbt:Cite_book dbt:Convert dbt:Infobox_locomotive dbt:One_source dbt:Track_gauge
builddate	July–August 1911 (en)
firstrundate	1911-09-19 (xsd:date)
powertype	Steam (en)
retiredate	1946 (xsd:integer)
serialnumber	366843668536687 (xsd:decimal)
uicclass	C1′ n4v (en)
valvegear	Walschaerts valve gear
whytetype	4 (xsd:integer)
builder	Baldwin Locomotive Works
caption	Southern Pacific 3900 (en)
fleetnumbers	4200 (xsd:integer)
operator	Southern Pacific Company
has abstract	Southern Pacific Company's AM-2 class of steam locomotives was Southern Pacific's (SP) only class of 4-6-6-2 locomotives ordered and built as cab forward locomotives. They were actually MM-2s that had been upgraded. MM-2s were built in 1911 by Baldwin Locomotive Works and entered service on SP beginning September 19, 1911. By 1914, they had all been upgraded with an additional leading axle making them 4-6-6-2 locomotives. They reclassified their MM-2 as AM-2. This was done to improve handling at speed. These locomotives were the predecessors of the AC-12 class cab forward locomotives built during World War II. SP used these locomotives in the Sierra Nevada for about 20 years, retiring them in the mid-1930s. They were stored in the railroad's Sacramento, California, shops for a couple years before being rebuilt with 4B Worthington feedwater heaters and uniform cylinders ("simpling" them) measuring 22 in diameter × 28 in stroke (559 mm by 711 mm). The rebuilds increased the class weight to 424,200 lb (192,410 kg) with 356,900 lb (161,890 kg) on the drivers, 210 psi (1.45 MPa) boiler pressure and 76,800 lbf (342 kN) tractive effort. The rebuilt locomotives were renumbered into the 3900 series then used on SP's Portland Division in Oregon until they were again retired in the late 1940s. The locomotives were all scrapped soon after retirement with the last, 3907 (originally 4207), on September 23, 1948. (en)
cylindercount	Four: two high pressure , two low pressure (en)
disposition	All scrapped (en)
feedwaterheater	4 (xsd:integer)
fueltype	Fuel oil (en)
operatorclass	AM-2 (en)
gold:hypernym	Pacific
prov:wasDerivedFrom	wikipedia-en:Southern_Pacific_class_AM-2?oldid=1056754858&ns=0
page length (characters) of wiki page	5165 (xsd:nonNegativeInteger)
builder	Baldwin Locomotive Works
foaf:isPrimaryTopicOf	wikipedia-en:Southern_Pacific_class_AM-2
is Link from a Wikipage to another Wikipage of	Whyte notation Southern Pacific class MM-2
is foaf:primaryTopic of	wikipedia-en:Southern_Pacific_class_AM-2

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