List of GM-EMD locomotives
Six-axle roadswitchers or Special Duty Locomotives ( SD )
Table:
Model designation
Build year
Total produced
AAR wheel arrangement
Prime mover
Power output
Image

SD7
1952–1953
188
C-C
EMD 16-567B
1,500 hp
(1.1 MW)

SD9
1954–1959
515
C-C
EMD 16-567C
1,750 hp
(1.7MW)

SD18
1960–1963
114
C-C
EMD 16-567D1
1,800 hp
(1.3 MW)

SD24
1958–1963
224
C-C
EMD 16-567D3
2,400 hp
(1,880 kW)

SD28
1965-1966
12
C-C
EMD 16-567D1
1,800 hp
1,300 kW)

SD35
1964–1966
360
C-C
EMD 16-567D3A
2,500 hp
(1.9 MW)

SDP35
1964–1965
35
C-C
EMD 16-567D3A
Steam generator
2,500 hp
(1.9 MW)

SD38
1967–1971
108
C-C
EMD 16-645E
2,000 hp
(1,500 kW)

SD38AC
1971
15
C-C
EMD 16-645E
2,000 hp
(1,500 kW)

SD38-2
1972–1979
90
C-C
EMD 16-645E
2,000 hp
(1,500 kW)

SDP38
1967
40
C-C
EMD 16-645E
2,000 hp
(1,500 kW)

SD39
1968–1970
54
C-C
EMD 12-645E3
2,300 hp
(1,700 kW)

SDL39
1969–1972
10
C-C
EMD 12-645E3
2,300 hp
(1.7 MW)

SD40X
1964–1965
9
C-C
EMD 16-645E3
3,000 hp
(2.2 MW)

SD40
1966–1972
1,268
C-C
EMD 16-645E3
3,000 hp
(2.2 MW)

SD40A
1969–1970
18
C-C
EMD 16-645E3
3,000 hp (2,240 kW)

SDP40
1966–1970
20
C-C
EMD 16-645E3
Steam generator
3,000 hp (2,240 kW)

SD40T-2
1974–1980
312
C-C
EMD 16-645E3
3,000 hp
(2.2 MW)

SD40-2
1972–1989
3,982
C-C
EMD 16-645E3
3,000 hp
(2.2 MW)

SD40-2W
1975–1980
123
C-C
EMD 16-645E3
3,000 hp
(2.2 MW)

Drawing on the accompanying table as well as the relevant paragraphs provided at the end.

State the answer to the question: How many of the model that used the engine that powered the 33-19 Titan prototype haul truck were built for American railroads ? Respond with the correct answer (omit explanations) in JSON format as {"answer": "YOUR ANSWER"}. Base your answer solely on the given information.

The AAR wheel arrangement system is a method of classifying locomotive ( or unit ) wheel arrangements that was developed by the Association of American Railroads . It is essentially a simplification of the European UIC classification , and it is widely used in North America to describe diesel and electric locomotives . It is not used for steam locomotives which use the Whyte notation instead . The AAR system counts axles instead of wheels . Letters refer to powered axles , and numbers to unpowered ( or idler ) axles . A refers to one powered axle , B to two powered axles in a row , C to three powered axles in a row , and D to four powered axles in a row . 1 refers to one idler axle , and 2 to two idler axles in a row . A dash ( - ) separates trucks , or wheel assemblies . A plus sign ( + ) refers to articulation , either by connecting bogies with span bolsters or by connecting individual locomotives via solid drawbars instead of couplers .
In engineering , a prime mover is an engine that converts fuel to useful work . In locomotives , the prime mover is thus the source of power for its propulsion . In an engine-generator set , the engine is the prime mover , as distinct from the generator .
Horsepower ( hp ) is a unit of measurement of power , or the rate at which work is done , usually in reference to the output of engines or motors . There are many different standards and types of horsepower . Two common definitions being used today are the mechanical horsepower ( or imperial horsepower ) , which is about 745.7 watts , and the metric horsepower , which is approximately 735.5 watts . The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses . It was later expanded to include the output power of other types of piston engines , as well as turbines , electric motors and other machinery . The definition of the unit varied among geographical regions . Most countries now use the SI unit watt for measurement of power . With the implementation of the EU Directive 80/181/EEC on January 1 , 2010 , the use of horsepower in the EU is permitted only as a supplementary unit .
An SD7 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between May 1951 and November 1953 . It had an EMD 567B 16-cylinder engine producing 1,500 horsepower ( 1.12 MW ) for its six traction motors . 188 were built for United States railroads . Starting in August 1953 a total of 26 SD7s were produced which used either the 567BC engine or the 567C engine . These units are noted on the roster below . This was the first model in EMD 's SD ( Special Duty ) series of locomotives , a lengthened B-B GP7 with a C-C truck arrangement . The two extra axles and traction motors are useful in heavy , low speed freight service . SD series locomotives are still being produced today , with the SD70 being the most popular example in current production , and with many SD40-2s and rebuilds to SD40-2 specifications , or SD60s still in operation . Yesterday 's Special Duty eventually became today 's Standard Duty , and yesterday 's General Purpose has become today 's Special Purpose ( time freight and other time-sensitive lading ) . True GPs were discontinued after the completion of the last GP60 in 1994 . Recently intermodal and other fast freights may be hauled by 6 axles locomotives with 4 powered axles , such as the SD70ACe-P4 . Many SD7s both high and short-hood can still be found in service today on shortline railroads and industrial operators , although most Class 1 roads stopped using these locomotives by the 1970s and 1980s .
The EMD 567 is a line of large medium-speed diesel engines built by General Motors ' Electro-Motive Division . This engine , which succeeded Winton 's 201A , was used in EMD 's locomotives from 1938 until its replacement in 1966 by the EMD 645 . It has a bore of 8 1⁄2 in ( 216 mm ) , a stroke of 10 in ( 254 mm ) and a displacement of 567 cu in ( 9.29 L ) per cylinder . Like the Winton 201A , the EMD 645 and the EMD 710 , the EMD 567 is a two-stroke engine . EMD 's chief competitor , GE , now makes EMD-compatible replacement parts .
The watt ( symbol : W ) is a unit of power . In the International System of Units ( SI ) it is defined as a derived unit of 1 joule per second , and is used to quantify the rate of energy transfer . In SI base units , the watt is described as k g m 2 s − 3 { \displaystyle kg\ , m^ { 2 } s^ { -3 } } , which can be demonstrated to coherent by dimensional analysis . The watt is named after James Watt , an 18th century scottish inventor .
An SD9 is a 6-axle road switcher diesel locomotive built by General Motors Electro-Motive Division between January 1954 and June 1959 . An EMD 567C 16-cylinder engine generated 1,750 horsepower ( 1.30 MW ) . This model is , externally , similar to its predecessor , the SD7 , but this model , internally , features the improved and much more maintainable 567C engine . The principal spotting feature are the classification lights on the ends of the locomotive , above the number board . The SD9 's classification lights are on a small pod , canted outward . The last phase of construction had a carbody similar to the SD18 and SD24 , and used two 48-inch ( 1,219 mm ) cooling fans instead of four 36-inch ( 914 mm ) cooling fans . Four hundred and seventy-one SD9s were built for American railroads and 44 for export . Many SD9s both high and short-hood can still be found in service today on shortline railroads and industrial operators . And while most Class 1 roads stopped using these locomotives by the 1970s and 1980s , some remain in rebuilt form on some major Class I railroads , as switcher locomotives . [ citation needed ] .
The EMD SD18 is a 6-axle road switcher diesel locomotive built by General Motors Electro-Motive Division between April 1960 and March 1963 . Power was provided by an EMD 567D1 16-cylinder engine which generated 1,800 hp ( 1.3 MW ) . 54 examples of this locomotive model were built for American railroads , and 60 for export , including fifteen for Korail ( order numbers 700735-700749 , serial numbers 28373-28387 ) .
The EMD SD24 was a 2,400 hp ( 1,800 kW ) six-axle ( C-C ) road switcher diesel-electric locomotive built by General Motors ' Electro-Motive Division of La Grange , Illinois between July 1958 and March 1963 . A total of 224 units were built for customers in the United States , comprising 179 regular , cab-equipped locomotives and 45 cabless B units . The latter were built solely for the Union Pacific Railroad . The SD24 was the first EMD production locomotive to be built with an EMD turbocharged diesel engine . The first SD24 was built sixteen months before the four-axle ( B-B ) model GP20 . Power output of the SD24 was 33 percent higher than the 1,800 hp ( 1,340 kW ) of the concurrent Roots blower-equipped SD18s with the same engine displacement . The SD24 had 400 hp ( 298 kW ) per axle , limited by the traction motors then available . Nevertheless , the turbocharged SD24 provided full rated power at all altitudes , which the Roots-blown SD18 could not provide . In terms of sales , the SD24 was only a moderate success , and had average service lives in SD24 configuration ( though a few deturbocharged rebuilds are still in operation ) , but the SD24 was a milestone in EMD locomotive development and the forerunner to today 's high-powered six-axle locomotives . EMD thought the Duluth , Missabe & Iron Range Railway would want to start purchasing the SD24 and sent the first demonstrator to the DMIR painted in the road 's livery . The DMIR did not end up purchasing the SD24 and the demonstrator went to the Union Pacific Railroad .
An EMD SD28 is a 6-axle road switcher diesel locomotive built by General Motors Electro-Motive Division between July 1965 and September 1965 . Power was provided by an EMD 567D1 16-cylinder engine which generated 1,800 horsepower ( 1.34 MW ) . This locomotive was basically a non-turbocharged version of the EMD SD35 . 6 examples of this locomotive model were built for American railroads . A further 6 a passenger variant , type SDP28 , were built for export to Korea in May 1966 .
An EMD SD35 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between June 1964 and January 1966 . Power was provided by an EMD 567D3A 16-cylinder engine which generated 2,500 brake horsepower ( 1,900 kW ) . A 3,000-US-gallon ( 11,000 L ; 2,500 imp gal ) fuel tank was used on this unit . This locomotive model shared a common frame with the EMD SD28 , giving it an overall length of 60 feet 8 1⁄2 inches ( 18.504 m ) . 360 examples of this locomotive model were built for American railroads .
An EMD SDP35 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between July 1964 and September 1965 . Power was provided by an EMD 567D3A 16-cylinder engine which generated 2,500 horsepower ( 1.9 MW ) . Essentially this locomotive was an EMD SD35 equipped with a steam generator , located in the extended long hood end , for passenger use . 35 examples of this locomotive model were built for American railroads .
A steam generator is a type of boiler used to produce steam for climate control and potable water heating in railroad passenger cars . The output of a railroad steam generator is low pressure , saturated steam that is passed through a system of pipes and conduits throughout the length of the train . Steam generators were developed when diesel locomotives started to replace steam locomotives on passenger trains . In most cases , each passenger locomotive was fitted with a steam generator and a feedwater supply tank . The steam generator used some of the locomotive 's diesel fuel supply for combustion . When a steam generator-equipped locomotive was not available for a run , a so-called heating car fitted with one or two steam generators was inserted between the last locomotive in the consist and the rest of the train . Steam generators would also be fitted to individual cars to enable them to be heated independently of any locomotive supply . In Ireland , Córas Iompair Éireann used heating cars as standard and CIÉ diesel locomotives were not fitted with steam generators .
The SD38 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between May 1967 and October 1971 . It had an EMD 645 16-cylinder engine generating 2,000 horsepower ( 1.5 MW ) , compared to the turbocharged EMD 645E3 V-16 engine that produced 3000 horsepower . The SD38 had the same frame as the SD39 , SD40 and SD45 . 52 were built for American railroads , one was built for a Canadian railroad , four were exported to a mining firm in Jamaica and seven were exported to a mining firm in Venezuela . The SD38 was succeeded by a Dash 2 version called the EMD SD38-2 .
The EMD 645 family of diesel engines was designed and manufactured by the Electro-Motive Division of General Motors . While the 645 series was intended primarily for locomotive , marine and stationary engine use , one 16-cylinder version powered the 33-19 Titan prototype haul truck designed by GM 's Terex division . The 645 series was an evolution of the earlier 567 series and a precursor to the later 710 series . First introduced in 1965 , the EMD 645 series remained in production on a by-request basis long after it was replaced by the 710 , and most 645 service parts are still in production . The EMD 645 engine series is currently supported by Electro-Motive Diesel , Inc. , which purchased the assets of the Electro-Motive Division from General Motors in 2005 . In 1951 , E. W. Kettering wrote a paper for the ASME entitled , History and Development of the 567 Series General Motors Locomotive Engine , which goes into great detail about the technical obstacles that were encountered during the development of the 567 engine . These same considerations apply to the 645 and 710 , as these engines were a logical extension of the 567C , by applying a cylinder bore increase , 645 , and a cylinder bore increase and a stroke increase , 710 , to achieve a greater power output , without changing the external size of the engines , or their weight , thereby achieving significant improvements in horsepower per unit volume and horsepower per unit weight .
An EMD SD38AC is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between June and October 1971 . It was basically an SD38 with an AR10 alternating current alternator instead of the SD38 's normal direct current generator . It produces 2,000 horsepower ( 1,500 kW ) from a 16-cylinder EMD 645E roots blown prime mover . It came equipped with or without dynamic brakes . This locomotive shared the same common frame with the SD39 , SD38 , SD40 and SD45 . The SD38AC is basically the transition engine between the SD38 and the SD38-2 . 15 examples of this model were built ; 6 for B & LE , 8 for DMIR and one for BC Hydro .
The EMD SD38-2 is a six-axle road switcher diesel locomotive built by General Motors Electro-Motive Division ( EMD ) from 1972 to 1979 . EMD built 90 of these medium road-switchers , which were used in both yard and mainline roles . Part of the EMD Dash 2 line , the SD38-2 was an upgraded SD38 with modular electronic control systems , HT-C trucks , and many other detail improvements . The locomotive 's power was provided by an EMD 16-645E 16-cylinder engine , which could generate 2,000 horsepower ( 1,500 kilowatts ) . These units were constructed with either 3,200 or 4,000 US gal ( 12,000 or 15,000 L ; 2,700 or 3,300 imp gal ) fuel tanks and were available with or without dynamic brakes . It shared the same 64-foot-8-inch ( 19.71 m ) frame as the SD40-2 and SD45-2 , which gives it a length over couplers of 68 feet 10 inches ( 20.98 m ) .
An SD39 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between August 1968 and May 1970 . 54 were built for American railroads . In 1966 EMD replaced all their old models with new ones having the new 645 diesel . These included six-axle models SD38 , SD40 , SDP40 and SD45 ; the SD39 was added in 1968 . All shared standard components including the frame , cab , traction alternator , trucks , traction motors , and air brakes . The difference was the power output : SD38 = 2,000 hp ( 1,490 kW ) from a non-turbocharged V16 , SD39 = 2,300 hp ( 1,720 kW ) from a turbocharged V12 , SD40 = 3,000 hp ( 2,240 kW ) from a turbocharged V16 , and SD45 = 3,600 hp ( 2,680 kW ) from a turbocharged V20 . The SD39 had the smallest prime mover and therefore had the most unused space above the frame , inside the hood between the main generator and electrical cabinet , and outside in large end porches .
An EMD SDL39 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between March 1969 and November 1972 . Power was provided by an EMD 645E3 12-cylinder engine which generated 2,300 horsepower ( 1.7 MW ) . All 10 examples of this locomotive model were built for Milwaukee Road , who wanted a lightweight road-switcher to replace their fleet of 1947-built ALCO RSC-2s . The unit was built on a short 55-foot-2-inch ( 16.81 m ) frame with C-C export trucks , barely tipping the scales at 250,000 pounds ( 110,000 kg ) and managing a light-footed axle-loading of just 20.8 short tons ( 18.6 long tons ; 18.9 t ) per axle . The EMD SDL39 is practically an experimental , lightweight version of the SD39 , but uses a GP38 's body and frame with the SD39 's engine . These Milwaukee Road units were numbered 581-590 . The 581 was wrecked at Sacred Heart , MN in 1983 , and scrapped the following year . The remaining nine units were transferred to the Soo Line Railroad when it acquired the Milwaukee Road . All were subsequently included in the sale of the Soo 's Lakes States Division ( most of its network in Wisconsin and Upper Michigan , plus some lines in adjoining Illinois and Minnesota ) to the new Wisconsin Central Limited . After the Wisconsin Central was purchased by , and merged into the Canadian National Railway , the nine units were returned to the leaser , and were sold to FEPASA , Chilean Freight Operation Concession .
An EMD SD40X is a 6-axle experimental road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between 1964 and 1965 . 9 examples of this locomotive were built for test purposes to test the new 645-series prime mover . After testing , eight were sold to the Union Pacific Railroad and one example to the Gulf , Mobile and Ohio Railroad . This locomotive is an experimental testbed for the production SD40 , but built on the shorter SD35 frame . This locomotive was also known as an SD35X . The designation SD40X was also given to an experimental version of the SD50 , built by EMD on an SD40-2 frame . 4 examples of this SD40X were built in 1979 and were delivered to the Kansas City Southern as KCS 700-703 .
The EMD SD40 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between January 1966 and August 1972 .
An EMD SD40A is a six-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between 1969 and 1970 . 18 examples of this locomotive were built exclusively for the Illinois Central Railroad . The SD40A was basically an SD40 built on an SDP45 frame . The longer SDP45 frame allowed for a larger , 5000 gallon fuel tank . This locomotive is powered by a sixteen-cylinder EMD 645E3 diesel engine , which could provide 3,000 horsepower ( 2,240 kW ) . Illinois Central Railroad used the SD40A as a long-range road-switcher , utilizing the larger fuel tank found on the SDP45 . The Soo Line Railroad eventually acquired five of these units and as of 2005 they are out of service . Six other units ( IC 6011 , and 6013-6018 ) remain in service under IC , which is now a subsidiary of Canadian National Railway
An SDP40 is a 6-axle passenger road switcher diesel-electric locomotive built by General Motors Electro-Motive Division ( EMD ) between June 1966 and May 1970 .
An SD40T-2 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division having a 16-cylinder EMD 645E3 diesel engine producing 3,000 horsepower ( 2,240 kW ) . 312 SD40T-2s were built for North American railroads between April 1974 and July 1980 . This locomotive and the SD45T-2 are popularly called tunnel motors , but EMD 's term is SD40-2s with cooling system modifications because they were designed for better engine cooling in mountainous areas . The difference between this locomotive and its non-tunnel motor cousin , the SD40-2 , are the radiator intakes and radiator fan grills located at the rear of the locomotive .
The EMD SD40-2 is a 3,000-horsepower ( 2,200 kW ) C-C road switcher diesel-electric locomotive built by EMD from 1972 to 1989 . The SD40-2 was introduced in January 1972 as part of EMD 's Dash 2 series , competing against the GE U30C and the ALCO Century 630 . Although higher-horsepower locomotives were available , including EMD 's own SD45-2 , the reliability and versatility of the 3,000-horsepower ( 2,200 kW ) SD40-2 made it one of the best-selling models in EMD 's history , edged only by the GP9 , and the standard of the industry for several decades after its introduction . The SD40-2 was an improvement over the SD40 , with modular electronic control systems similar to those of the experimental DDA40X . Peak production of the SD40-2 was in the mid-1970s . Sales of the SD40-2 began to diminish after 1981 due to the oil crisis , increased competition from GE 's Dash-7 series and the introduction of the EMD SD50 , which was available concurrently to late SD40-2 production . The last SD40-2 delivered to a United States railroad was built in July 1984 , with production continuing for railroads in Canada until 1988 , Mexico until February 1986 , and Brazil until October 1989 . As of 2013 , nearly all built still remain in service . The SD40-2 has seen service in Canada , Mexico , Brazil and Guinea . To suit export country specifications , General Motors designed the JT26CW-SS ( British Rail Class 59 ) for Great Britain , the GT26CW-2 for Yugoslavia , South Korea , Iran , Morocco , Peru and Pakistan , while the GT26CU-2 went to Zimbabwe and Brazil . Various customizations led Algeria to receive their version of a SD40-2 , known as GT26HCW-2 .
The EMD SD40-2 is a 3,000-horsepower ( 2,200 kW ) C-C road switcher diesel-electric locomotive built by EMD from 1972 to 1989 . The SD40-2 was introduced in January 1972 as part of EMD 's Dash 2 series , competing against the GE U30C and the ALCO Century 630 . Although higher-horsepower locomotives were available , including EMD 's own SD45-2 , the reliability and versatility of the 3,000-horsepower ( 2,200 kW ) SD40-2 made it one of the best-selling models in EMD 's history , edged only by the GP9 , and the standard of the industry for several decades after its introduction . The SD40-2 was an improvement over the SD40 , with modular electronic control systems similar to those of the experimental DDA40X . Peak production of the SD40-2 was in the mid-1970s . Sales of the SD40-2 began to diminish after 1981 due to the oil crisis , increased competition from GE 's Dash-7 series and the introduction of the EMD SD50 , which was available concurrently to late SD40-2 production . The last SD40-2 delivered to a United States railroad was built in July 1984 , with production continuing for railroads in Canada until 1988 , Mexico until February 1986 , and Brazil until October 1989 . As of 2013 , nearly all built still remain in service . The SD40-2 has seen service in Canada , Mexico , Brazil and Guinea . To suit export country specifications , General Motors designed the JT26CW-SS ( British Rail Class 59 ) for Great Britain , the GT26CW-2 for Yugoslavia , South Korea , Iran , Morocco , Peru and Pakistan , while the GT26CU-2 went to Zimbabwe and Brazil . Various customizations led Algeria to receive their version of a SD40-2 , known as GT26HCW-2 .