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Introduced in 2012, General Electric's Tier 4 GEVo Series represents the latest in diesel-electric locomotive technology. The GE Tier 4 GEVo is designed to meet increasingly stringent Environmental Protection Agency (EPA) emissions regulations.

The EPA “Tier” emissions standards are a series, or Tiers, of allowable emissions levels based upon a locomotives’ date of manufacture. The highest and most stringent tier level, Tier 4, sets maximum allowable NOx and hydrocarbon emissions levels for more…

GE 16-7FDL Early ED2

This was recorded from a Later U Series 16 cyl GE.

First introduced in the late 50's, the GE FDL is one of the most popular locomotive prime movers ever produced. Aside from a very few HDL prime movers installed in the AC6000CW's, FDL prime movers were still being put in every new GE locomotive until 2003 when the first Evolution Series was implemented.

1st Generation Horn Template Pack 2
Horns (SoundCV9):
CV163=0 Nathan P5
CV163=1 Nathan K5LA
CV163=2 Nathan M3H
CV163=3 Leslie RS-2M more…

CAT Powered 3608

CP 4711 was rebuilt in 1988 with a Caterpillar 3608 prime mover. In 1998 this loco was sold to Minnesota Commercial where is still resides today wearing Road number 71.

Prime Mover:
CAT 3608

1st Generation Horn Template Pack 3
Horns (SoundCV9):
CV163=0 Nathan P5
CV163=1 Nathan K5LA
CV163=2 Nathan M3H
CV163=3 Leslie RS-2M
CV163=4 Nathan K3HA
CV163=5 Nathan K3L
CV163=6 Nathan K3H
CV163=7 Nathan K5H
CV163=8 Nathan P5A
CV163=9 Nathan P5 (Old Cast)
CV163=10 Nathan M3RT1
CV163=11 Leslie more…

ALCO 12-251C C420

The ALCO 251 prime mover was the most popular and abundant prime mover ever made by the company. While it proved to be quite successful, it sadly outlived its original manufacturer, ALCO who closed their doors in 1969. The 251 prime mover is actually still available to purchase today from Fairbanks Morse for use in Marine, Generator, and locomotive uses.

The 12cyl 251C can be found in the following Locomotives:
45 Class
442 Class
600 Class
700 more…

EMD 16-567C 4EXH GP10

The Paducah GP10s were the result of a rebuild program upgrading GP7, GP8 and GP18 EMD locomotives. Unlike the GP16 program which recieved 645 power assemblies the GP10s retained a 567 16cyl prime mover. Now using a 567C block, a 4 stack exhaust was applied in most cases. Many smaller railroads still use GP10s and it was deemed a rather successful program.

1st Generation Horn Template Pack 2
Horns (SoundCV9):
CV163=0 Nathan P5
CV163=1 Nathan K5LA
CV163=2 Nathan M3H
CV163=3 Leslie RS-2M more…

EMD 20-710G3B

The SD80MAC is a 5000 horsepower C-C diesel-electric locomotive. The SD80MAC uses a 20 cylinder version of EMD's 710G prime mover,formally known as the V-20 710G3B-ES and is the first diesel locomotive to use a 20-cylinder engine since the SD45/SD45-2. The SD80MAC introduced a wide radiator housing similar to GE locomotives and the placement of dynamic brakes at the rear of the locomotive. Key spotting difference between the SD80MAC and SD90MAC include: no external rear sandbox on the 90MAC, more…


The GE U18B was introduced by GE as a branch line roadswitcher in 1973. Easy to spot due to its relatively short length — 54 ft 8 in (16.66 m) — it was the only North American locomotive powered by the 8-cylinder FDL engine.

There were some export locomotives built with this prime mover:
SG10B, U15C, U17C, U20C, and the C18-7i

The U18B was not well recieved as only 5 railroads bought the locomotive, with one railroad only purchasing 1 unit, for total of 163 units produced. The Seaboard more…

EMD 12-567C

The EMD 567 family of Prime Mover was one of the most widely used in the world! From F-Units to Geeps this popular power house can still be found in many locomotives riding the rails today. Our EMD 12cyl version of the 567C would be appropriate for the following locomotives:

LWT12 (Aerotrain)

Although the following locomotives used a slightly different variation of the EMD 12cyl 567, our sound file would be acceptable in the following as well:


1st more…

GE Cat 44

The GE 44-ton switcher is a 4-axle diesel-electric locomotive built by General Electric between 1940 and 1956. The locomotives were available with a choice of prime movers. Most were built with a pair of Caterpillar Inc.'s D17000 V8 180 horsepower (134 kW) engines. It was designed for industrial and light switching duties, often replacing steam locomotives that had previously been assigned these chores. This locomotive's specific 44-short ton weight was directly related to one of the more…


GE Evolution 12cyl "GEVO" locomotives have a 4 stoke diesel engine and have been designed to be more efficient and more emission friendly than previous models. Evolution Series locomotives are equipped with either AC or DC traction motors, depending on the customer's preference, though admittedly there is little sound difference if any between the two.

All early GEVOs were delivered with a Nathan Airchime K5HL air horn. Later GEVOs started to recieve a slightly different K5HLL horn. Most if more…