The Alco 539T was a

diesel Diesel may refer to: * Diesel engine, an internal combustion engine where ignition is caused by compression * Diesel fuel, a liquid fuel used in diesel engines * Diesel locomotive, a railway locomotive in which the prime mover is a diesel engin ...

prime mover (locomotive engine) built by the

American Locomotive Company The American Locomotive Company (often shortened to ALCO, ALCo or Alco) was an American manufacturer of locomotives, diesel generators, steel, and tanks that operated from 1901 to 1969. The company was formed by the merger of seven smaller locomo ...

. This engine was also used as a stationary powerplant, used in

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pumping station Pumping stations, also called pumphouses in situations such as well drilling, drilled wells and drinking water, are facilities containing pumps and equipment for pumping fluids from one place to another. They are used for a variety of infrastru ...

tugboat A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line. These boats typically tug ships in circumstances where they cannot or should not move under their own power, su ...

s and

dredges Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing da ...

. It has a

straight-six The straight-six engine (also referred to as an inline-six engine; abbreviated I6 or L6) is a piston engine with six cylinders arranged in a straight line along the crankshaft. A straight-six engine has perfect primary and secondary engine balan ...

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

design in a

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block which produced from . The engine has a

bore Bore or Bores often refer to: *Boredom * Drill Relating to holes * Boring (manufacturing), a machining process that enlarges a hole ** Bore (engine), the diameter of a cylinder in a piston engine or a steam locomotive ** Bore (wind instruments), ...

(cylinder

diameter In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for ...

) of , and a

stroke A stroke is a medical condition in which poor blood flow to the brain causes cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. Both cause parts of the brain to stop functionin ...

of . The 539 engine was built at Alco's

Auburn, New York Auburn is a city in Cayuga County, New York, United States. Located at the north end of Owasco Lake, one of the Finger Lakes in Central New York, the city had a population of 26,866 at the 2020 census. It is the largest city of Cayuga County, the ...

engine plant and later starting in September 1949 in Canada. The 539T was equipped with the Buchi

turbocharger In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

, being made under license by the Elliott Manufacturing Company of Jeannette, Pennsylvania. The first 539T engines were used in S-2 switchers and DL-105 passenger locomotives built in September 1940. Alco locomotives using this engine include the S-2, S-4, RS-1, RSC-1, RSD-1, DL-105, DL-107, DL-108, DL-109, and DL-110. MLW locomotives using this engine include the S-2, S-4, S-7,

S-12 S12 may refer to: Aviation * Albany Municipal Airport (Oregon), in Linn County, Oregon, United States * Letov Š-12, a Czechoslovakian prototype fighter aircraft * Rans S-12 Airaile, an American civil utility aircraft * SABCA S.XII, a Belgian pas ...

, RS-1, and RSC-13. An eight-cylinder inline version of the 539T was developed by Alco. This diesel engine developed from . It was never used in a locomotive, but a twin bank V8 had been planned to be used in an early version of the “Black Maria” DL-202/DL-203 in response to EMD's FT locomotive. The inline 8-539T was used in stationary and marine applications. The 539 engine was developed in response to the perceived drawback that Alco's line of diesel switchers had a restricted field of vision because of the high hood. Both Baldwin and EMC were offering diesel switchers with a lower engine hood that the trainmen could see over. The 539 engine was developed from the 538 engine, both had the same cylinder dimensions. The engine base of the 538 was flat and rode on a flat underframe. The change that the 539 offered was to lower the base of the engine into the frame. This was done with revised mounting lugs and a modified oil pan. The modified 538 became known as the 539 and the change allowed the engine hood to be lowered by . A very similar engine developed for the

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

was the 540T. This engine used a welded block. The welded construction was required because the specified shock tolerance requirements prohibit the use of cast blocks. The Navy 540 was used in patrol boats,

mine sweeper Mine, mines, miners or mining may refer to: Extraction or digging * Miner, a person engaged in mining or digging *Mining, extraction of mineral resources from the ground through a mine Grammar *Mine, a first-person English possessive pronoun ...

mine layer A minelayer is any warship, submarine or military aircraft deploying explosive mines. Since World War I the term "minelayer" refers specifically to a naval ship used for deploying naval mines. "Mine planting" was the term for installing controll ...

s, and tug boats: * 30 of 123 s ** Two 855shp ALCO 539 diesel engines, Farrel-Birmingham single reduction gear, two shafts.see Admirable-class page for references * 9 of 95 s ** Two 1,559shp ALCO 539, Westinghouse single reduction gear

References

* *Close examination of actual engine blocks. *Steinbrenner, Richard T. (2003). The American Locomotive Company: A Centennial Remembrance. On Track Publishers LLC, New Brunswick, NJ. . {{ALCO engines Diesel locomotive engines

539 Year 539 ( DXXXIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Strategius without colleague (or, less frequently, year 1292 ' ...

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