ALCO RS-11

The ALCO RS-11 is a class of diesel-electric locomotive rated at 1,800 hp (1.34 MW), that rode on two-axle trucks, having a B-B wheel arrangement. This model was built by both Alco (327 units) and Montreal Locomotive Works (99 units). Total production was 426 units.
==Development==
The first three RS-11s were produced by ALCO in February 1956 as a demonstrator set. This locomotive, classified by ALCO as model DL-701, was their first high-horsepower road switcher, intended to be a replacement for the very popular RS-3 road switcher. Featuring a V-12, 1,800 hp (1,300 kW) 251B diesel engine, the RS-11 was ALCO's answer to EMD's very successful GP9. The turbocharged RS-11 accelerated faster, had a higher tractive effort rating and typically used less fuel than the competition. It was also quite versatile and could be found in heavy haul freight as well as passenger service. It was produced in high-nose and low-nose versions. Montreal Locomotive Works also built 351 nearly identical units, known as the RS-18, for the Canadian market.
While the RS-11 benefited from the increased power and reliability offered with ALCO's new 251B engine, and was arguably a more advanced product than the GP9, its market acceptance was disappointing against the reputation EMD's locomotives had made for superior reliability.
==Original purchasers==
Owner: 	Quantity	Numbers 	Notes
Alco 	3 	701, 701A, 701B 	
Carolina and Northwestern Railway 	1 	11 	
Chicago and Northwestern Railway 	2 	1613, 1624 	RS-3s rebuilt by Alco in March 1960 as RS-11 with a 251-B engine but retained RS-3 high short hood.
Delaware and Hudson 	12 	5000-5011 	
Duluth, Winnipeg and Pacific 	15 	3600-3614 	
Erie Mining 	15 	300-314 	
Ferrocarril del Pacifico 	1 	1501 	
Ferrocarriles Nacionales de México 	94 	7200-7293 	
Green Bay and Western 	1 	309 	
Lehigh Valley Railroad 	4 	400-403 	
Maine Central 	1 	801 	
Ministry of Communication and Transportation (Mexico)	4 	7123-1 - 7123-4 	
Missouri Pacific 	12 	4601-4612 	
Monongahela Connecting Railroad 	1 	700 	
New York, New Haven and Hartford 	15 	1400-1414 	
New York Central 	9 	8000-8008 	
New York, Chicago and St. Louis Railroad 	35 	558-577, 850-864 	
Norfolk and Western 	99 	308-406 	
Northern Pacific 	18 	900-917 	
Pennsylvania 	38 	8617-8654 	
Portland Terminal 	1 	1082 	
Seaboard Air Line 	10 	100-109 	
Southern Peru Copper Corp. 	5 	3-6, 8 	
Southern Pacific Railroad 	34 	5723-5729, 5845-5871	
Toledo, Peoria and Western Railway 	3 	400-402 	
Total 	431 	 	
==Preservation==
*Duluth, Winnipeg and Pacific 3612 is preserved as York-Durham Heritage Railway 3612 at the York–Durham Heritage Railway in Ontario
*Ferrocarriles Nacionales de México 7282 is preserved at the Yucatan RR Museum in Mérida, Yucatán.
*New York, New Haven and Hartford 1402 is preserved at the Danbury Railway Museum in Danbury, Connecticut
*Toledo, Peoria and Western 400 is preserved at the Illinois Railway Museum in Union, Illinois
== Gallery ==
File:18691689168207871u19870091277916.jpg
File:NVR62AB.jpg
File:Nw2575 dvl.jpg
File:TPW 400 20050716 Illinois Railway Museum.jpg|Toledo, Peoria and Western Railway No. 400 on display at Illinois Railway Museum, July 16th, 2005.
==See also==
*List of ALCO diesel locomotives
*List of MLW diesel locomotives
==References==
*Roster from The Diesel Shop http://www.thedieselshop.us/Alco_RS11.HTML
*Waller, R. (1998). Locomotive Roster: 1976. Conrail Cyclopedia . Retrieved November 22, 2022, from http://crcyc.railfan.net/locos/misc/rosters/roster-76.html
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