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GMD 16-645C 2-EXH NT 
H0 N XL L M4
- Article numbers:S0860
- Last change: 8/11/2026
- Manufacturer: ESU
The Canadian National Railway (CN) rebuilt locomotives into GP9RM, with the "RM" denoting for "Remanufactured", the first batch of 37 GP9s were rebuilt between 1981 and 1984, and were numbered as 4000 through 4036, the second batch of 44 GP9s were rebuilt in two periods, with the first 17 being rebuilt in 1984, and the remaining 27 being rebuilt between 1989 and 1991, all of which were numbered 4100 through 4143, the third batch of 84 GP9s being rebuilt in two periods, with the first 14 being rebuilt in 1985, and the remaining 70 GP9s being rebuilt between 1991 and 1993, all of which were numbered 7000 through 7083, and there was the fourth batch of 81 GP9s divided into three periods, with the first 49 being rebuilt between 1985 and 1988, the second 22 being rebuilt in 1990, and the remaining 10 being rebuilt between 1993 and 1994, all of which were numbered 7200 through 7280.
As the EMD 567s got worn, Many Railroads underwent rebuild programs to prolong the life of their locomotives. One Program in particular was the Uceta GP-16 program on the SCL. Starting in 1979 they took many of their GP7s, GP9s, and GP18s and replaced the existing 567 prime movers with 16cyl 645C Power Assemblies. This combination resulted in a unique sound never before released in the Model Railroad Market.
There were a number of these rebuild programs by many railroads. CN Had GP9RMs, The DM&IR had SD-Ms rebuilt from SD9's and SD18's and others. While there were different Exhuast configurations, This file will be very close to the following locomotives:
GP9RM, GP9U, GP16, FP9U, GP9RM, SD9M, SD-M, GP7U (Some- Check your prototype)
The following locos were rebuilt from 567D Turbo locos, that have been de-turboed and repowered with the 645C Power Assemblies:
GP20E, GP20M, GP35M, GP35R, GP38M, SD18M, SD20-2, SD35R, SD20
Recorded from a GMD GP9RM
This project is a normal idle version. It has 2 exhaust stacks.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
1st Generation Horn Pack 7
Horns (SoundCV9):
CV163=0 IEC-Holden K-3L
CV163=1 IEC-Holden K-3L-R3
CV163=2 Nathan M-3H
CV163=3 Nathan M-3H Ed2
CV163=4 Nathan M-3H-R2
CV163=5 Nathan M-3-RT1
CV163=6 Nathan K-3H
CV163=7 Nathan K-3H-R1
CV163=8 Nathan K-5L
CV163=9 Nathan K-5H Ed2
CV163=10 Nathan K-3L-R2
CV163=11 Nathan K-3L-R3
CV163=12 Nathan P-3 Ed2
CV163=13 Prime PM-990
GMD Bell Template Pack 2
Bells (SoundCV10):
CV164=0 EMD 8004156 Bronze Bell 018
CV164=1 EMD 8004156 Bronze Bell 019
CV164=2 EMD 8475495 Steel Bell 020
CV164=3 EMD 8475495 Steel Bell 021
CV164=4 EMD 8475495 Steel Bell 023
CV164=5 EMD 8475495 Steel Bell 069
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
1st Generation Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe
CV165=1 Cast Iron Shoe
EMD 1st Generation Air Dryer Template Pack 2
Air Dryer (SoundCV12)
CV166=0 GP9 Air Dryer 1
CV166=1 GP9 Air Dryer 2
CV166=1 GP8 Air Dryer 1
CV166=1 CF7 Air Dryer 1
S0860 - Release Notes
===================================================
V-1 R-1:
===================================================
- new project Hide description more…
H0 N XL L M4
- Article numbers
- S0860
- Last change
- 8/11/2026
- Manufacturer
- ESU
Cooper Bessemer 6-FW-6-LT H0 N XL L M4
- Article numbers:S0786
- Last change: 8/11/2026
- Manufacturer: ESU
General Electric produced the 70-ton switcher as a complement to its 44-ton model. The idea behind the development of the 70-tonner was to provide a locomotive suitable for branch lines, switching and transfer service. To be a success, the locomotive had to satisfy certain criteria. It had to be:
• Light enough to run on 50-pound rail and light bridges,
• Powerful enough to move long cuts of cars in switching or road hauls.
and
• Fast enough to make light passenger runs.
The 44-tonner could do most of these jobs adequately, but required multiple units to pull much weight. It was evident that a new locomotive was needed - one that would be larger than the 44-tonner, but smaller than the 1,000 - horsepower types such as Alco's S-2 or the EMD NW2, The 139,000 - pound weight (70 tons) was ultimately decided on, as it would run on light trackage without necessitating major rebuilding, but could pull twice as much tonnage as the 44-ton model.
A standard end-cab layout was dictated by a decision to use the Cooper-Bessemer FWL-6T, a six-cylinder, 600-horsepower engine, instead of two smaller engines, as in the 44-tonner. This body design also provided crew protection while operating in train service, and excellent visibility for switching. Power was transmitted to the wheels using a GE GT-571 generator and four GE 748 traction motors. This combination allowed for the development of 32,600 pounds of tractive effort and a top speed of 55 MPH. In early May 1946, demonstrator 7001 was outshopped and started touring the country, displaying the unit's virtues. Short lines especially were impressed with what they saw, and ordered many units. Stories of how the 70 tonner saved a dying short line were promoted in the railway press, and General Electric took advantage of this free publicity as an opportunity to build sales.
Among the many reasons listed for the short line resurrections were:
• Little or no rebuilding of the trackage was necessary to accommodate the units,
• Up to 95 percent availability of the unit, and
• A large reduction in fuel and maintenance costs over those of steam locomotives.
As production went on, the basic layout of the unit remained unchanged, but it was upgraded cosmetically as well as mechanically. By the end of production, tractive effort had been increased to 34,100 pounds (from 32,600 pounds), top speed was 60 MPH, and the engine developed 660 horsepower compared to the initial 600 horsepower.
GE 70 Tonner
GE 95 Tonner
Export Locos
U9B
U9C
Similar to Cooper Bessemer GN6 and EN6 prime movers.
45 Tonner
46 Tonner
47 Tonner
50 Tonner
57 Tonner
61 Tonner
65 Tonner
68 Tonner
This project is a normal idle version. It is an air throttle version. It has a single exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
1st Generation Switcher Horn Pack 1
Horns (SoundCV9):
CV163=0 Handcock 4700 Whistle
CV163=1 Leslie A-125
CV163=2 Leslie A-200
CV163=3 Leslie S-25
CV163=4 Leslie S-2M
CV163=5 Leslie S-3K
CV163=6 Leslie S-3L
CV163=7 Nathan M-3
CV163=8 Nathan M-5
CV163=9 Nathan P-2
CV163=10 Nathan P-3-OC
CV163=11 Nathan P-5-OC
CV163=12 Wabco A-2
CV163=13 Wabco AA-2
CV163=14 Wabco E-2
CV163=15 Nathan K-3L
GE Switcher Auto Bell On/Off Trigger Template Pack 1
Bells (SoundCV10):
CV164=0 GE 45-Tonner Air Bell
CV164=1 GE M 6731022A Steel Bell 017
CV164=2 GE M 6731022A Steel Bell 027
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
Switcher Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe #1
CV165=1 Cast Iron Shoe #1
ALCO Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 S-1 Air Dryer 1
CV166=1 C-425 Air Dryer 1
CV166=2 RS-18 Air Dryer 1
CV166=3 RS-18 Air Dryer 2
S0786 - Release Notes
===================================================
V-2 R-2:
===================================================
- description mispelling fix
- description brake squeal error fix
- soundslot brake squeal spelling mistake
- remastered prime mover
- prime mover volume selection mode
- brake 1 and 2 settings change
- brake set/release change
- traction motor update Hide description more…
H0 N XL L M4
- Article numbers
- S0786
- Last change
- 8/11/2026
- Manufacturer
- ESU
EMD 16-645C 2EXH NT H0 N XL L M4
- Article numbers:S0708
- Last change: 7/21/2026
- Manufacturer: ESU
As the EMD 567s got worn, Many Railroads underwent rebuild programs to prolong the life of their locomotives. One Program in particular was the Uceta GP-16 program on the SCL. Starting in 1979 they took many of their GP7s, GP9s, and GP18s and replaced the existing 567 prime movers with 16cyl 645C Power Assemblies. This combination resulted in a unique sound never before released in the Model Railroad Market.
There were a number of these rebuild programs by many railroads. CN Had GP9RMs, The DM&IR had SD-Ms rebuilt from SD9's and SD18's and others. While there were different Exhuast configurations, This file will be very close to the following locomotives:
GP16, FP9U, GP9RM, SD9M, SD-M, GP7U (Some- Check your prototype)
The following locos were rebuilt from 567D Turbo locos, that have been de-turboed and repowered with the 645C Power Assemblies:
GP20E, GP20M, GP35M, GP35R, GP38M, SD18M, SD20-2, SD35R, SD20
Recorded from a EMD SD-M
This project is a normal idle version. It has 2 exhaust stacks.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
1st Generation Horn Pack 2
Horns (SoundCV9):
CV163=0 Leslie S-3J
CV163=1 Leslie S-3K-R
CV163=2 Leslie RS-3L
CV163=3 Leslie S-5T-F
CV163=4 Leslie S-5T-R
CV163=5 Leslie S-5T-RRO
CV163=6 Leslie SL-4T
CV163=7 Nathan K-5LA
CV163=8 Nathan M-3H-R2
CV163=9 Nathan M-3-R1
CV163=10 Nathan M-3-RT1
CV163=11 Nathan M-5-R24
CV163=12 Wabco A-2
EMD 1st Generation Bell Template Pack 1
Bells (SoundCV10):
CV164=0 EMD 8475495 Steel Bell 006
CV164=1 EMD 8004156 Bronze Bell 001
CV164=2 UKM B443 Steel Bell 003
CV164=3 Graham-White E-Bell 003
CV164=4 EMD 8004156 Bronze Bell 002
CV164=5 WRRS 222 M-Bell End 001
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
1st Generation Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe
CV165=1 Cast Iron Shoe
EMD 1st Generation Air Dryer Template Pack 5
Air Dryer (SoundCV12)
CV166=0 GP28 Air Dryer 1
CV166=1 SD18 Air Dryer 1
CV166=1 SD-M Air Dryer 1
CV166=1 SD-M Air Dryer 2
S0708 - Release Notes
===================================================
V-3 R-3:
===================================================
- description mispelling fix
- description brake squeal error fix
- soundslot brake squeal spelling mistake
- remastered prime mover
- prime mover volume selection mode
- brake 1 and 2 settings change
- brake set/release change
- traction motor update Hide description more…
H0 N XL L M4
- Article numbers
- S0708
- Last change
- 7/21/2026
- Manufacturer
- ESU
Pioneer Zephyr H0 N XL L M4
- Article numbers:S0842
- Last change: 7/20/2026
- Manufacturer: ESU
The Pioneer Zephyr is a diesel-powered trainset built by the Budd Company in 1934 for the Chicago, Burlington & Quincy Railroad (CB&Q), commonly known as the Burlington Route. The trainset was the second internal-combustion–powered streamliner built for mainline service in the United States (after the Union Pacific Railroad's M-10000), the first such train powered by a diesel engine, and the first to enter revenue service.
The trainset consists of one power/storage car, one baggage/RPO/buffet/coach car, and one coach/observation car. The cars are made of stainless steel, permanently articulated together with Jacobs bogies. The construction incorporated recent advances such as shotwelding (a specialized type of spot welding) to join the stainless steel, and unibody construction and articulation to reduce weight. It was the first of nine similarly built trainsets made for Burlington and its technologies were pivotal in the subsequent dieselization of passenger rail service.
Its operating economy, speed, and public appeal demonstrated the potential for diesel-electric-powered trains to revitalize and restore profitability to passenger rail service that had suffered a catastrophic loss of business with the Great Depression. Originally named the Burlington Zephyr during its demonstration period, it became the Pioneer Zephyr as Burlington expanded its fleet of Zephyr trainsets.
On May 26, 1934, it set a speed record for travel between Denver and Chicago when it made a 1,015.4-mile (1,633 km) non-stop "Dawn-to-Dusk" dash in 13 hours 5 minutes at an average speed of almost 78 mph (124 km/h). For one section of the run, it reached a speed of 112.5 mph (181 km/h). The historic dash inspired a film ("The Silver Streak") and the train's nickname, "The Silver Streak".
The train entered regular revenue service on November 11, between Kansas City, Missouri; Omaha, Nebraska; and Lincoln, Nebraska. It operated this and other routes until its retirement in 1960, when it was donated to Chicago's Museum of Science & Industry, where it remains on public display. The train is generally regarded as the first successful streamliner on American railroads.
Though no Pioneer Zephyr runs today, we used an 8-567C prime mover for this project.
This project is a normal idle version. It is an air throttle version. It has switcher type exhaust with a single exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
Pioneer Zephyr Horn Pack 1
Horns (SoundCV9):
CV163=0 Leslie A-200 + Leslie A-125 Horn Combo
CV163=1 Leslie A-200 + Leslie A-125 Horn Combo Ed2
CV163=2 Leslie A-200
CV163=3 Leslie A-125
CV163=4 Leslie A-200 Ed2
CV163=5 Leslie A-125 Ed2
CV163=6 Leslie A-75 Ed2
CV163=7 Wabco E-2
CV163=8 Wabco E-2 Ed2
CV163=9 Hancock 4700 Whistle
CV163=10 Hancock 4700 Whistle Ed2
CV163=11 Nathan MS-1
CV163=12 Nathan M-5
CV163=13 Nathan M-3
CV163=14 Leslie A-75
Pioneer Zephyr Bell Template Pack 1
Bells (SoundCV10):
CV164=0 Pioneer Zephyr Air Bell 001
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
1st Generation Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe #1
CV165=1 Cast Iron Shoe #1
EMD 1st Generation Switcher Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 NW2 Air Dryer 1
CV166=1 NW5 Air Dryer 1
CV166=2 SW7 Air Dryer 1
CV166=3 SW10 Air Dryer 1
S0842 - Release Notes
===================================================
V-1 R-1:
===================================================
- new project
V-2 R-2:
===================================================
- bell update Hide description more…
H0 N XL L M4
- Article numbers
- S0842
- Last change
- 7/20/2026
- Manufacturer
- ESU
ALCO 16-251B Ed2 H0 N XL L M4
- Article numbers:S0527
- Last change: 7/10/2026
- Manufacturer: ESU
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 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.
Our recording is from a 16cyl 251B and could be found in the following locomotives:
RS27, C424, C430, RSD-15, C630, C636, WDM-2 (Indian Railways)
Recorded from a ALCO C-424
This project is a normal idle version. It has a single exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
1st Generation Horn Pack 2
Horns (SoundCV9):
CV163=0 Leslie S-3J
CV163=1 Leslie S-3K-R
CV163=2 Leslie RS-3L
CV163=3 Leslie S-5T-F
CV163=4 Leslie S-5T-R
CV163=5 Leslie S-5T-RRO
CV163=6 Leslie SL-4T
CV163=7 Nathan K-5LA
CV163=8 Nathan M-3H-R2
CV163=9 Nathan M-3-R1
CV163=10 Nathan M-3-RT1
CV163=11 Nathan M-5-R24
CV163=12 Wabco A-2
ALCO Bell Template Pack 1
Bells (SoundCV10):
CV164=0 ALCO Bronze Bell 003
CV164=1 ALCO Bronze Bell 005
CV164=2 ALCO Bronze Bell 006
CV164=3 ALCO Bronze Bell 010
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
1st Generation Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe #1
CV165=1 Cast Iron Shoe #1
ALCO Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 S-1 Air Dryer 1
CV166=1 C-425 Air Dryer 1
CV166=2 RS-18 Air Dryer 1
CV166=3 RS-18 Air Dryer 2
S0527 - Release Notes
===================================================
V-2 R-2:
===================================================
- description mispelling fix
- description brake squeal error fix
- soundslot brake squeal spelling mistake
- remastered prime mover
- prime mover volume selection mode
- brake 1 and 2 settings change
- brake set/release change
- traction motor update
Hide description more…
H0 N XL L M4
- Article numbers
- S0527
- Last change
- 7/10/2026
- Manufacturer
- ESU
GE 16-7FDL16E19 LATE EXH H0 N XL L M4
- Article numbers:S0713
- Last change: 7/8/2026
- Manufacturer: ESU
The GE FDL-16 prime mover was first used in 1959 in the General Electric U25B locomotive. Over the years little changed in terms of sound until the "Dash-8" series of GE locomotives was introduced. Known for their throaty chug and shaft driven compressor (rather than the more modern “Whoop” electric compressor). There was an interim period following the "U Boats" that began the era in GE called the "Dash-7s". During this time many locos started receiving exhaust silencers and the shape of the exhaust changed to the "Bathtub" type. This created a subtle change in sound. The following GE locomotives used the 16cyl FDL prime mover with this type of configuration.
Locomotives:
B30-7, B36-7, C30-7, C36-7, and others.
The following locomotives would use early 16cyl FDL configurations, but this file would work for them as it is very close. Check your prototype as some of the later “U boats” were upgraded with more modern exhausts. You could also use our 73445/74445 GE 16cyl FDL Early file:
U25B, U28B, U30B, U33B, U36B, U25C, U28C, U28CG, U30C, U30CG, P30CH, U34CH, U33C, U36C
Recorded from a GE C30-7
This project is a normal idle version. It has a single late (silenced) exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
2nd Gen Horn Pack 1
Horns (SoundCV9):
CV163=0 Leslie S-3K-R
CV163=1 Leslie S-3L-R
CV163=2 Leslie S-5T-F
CV163=3 Leslie S-5T-R
CV163=4 Nathan K-3H
CV163=5 Nathan K-3L
CV163=6 Nathan K-3LA
CV163=7 Nathan K-5H
CV163=8 Nathan K-5LA
CV163=9 Nathan K-5LA-R24
CV163=10 Nathan M-3
CV163=11 Nathan M-3H
CV163=12 Nathan P-3
CV163=13 Nathan P-5-R24
GE Dash 7 Bell Template Pack 2
Bells (SoundCV10):
CV164=0 GE M 6731022A Steel Bell 011
CV164=1 GE M 6731022A Steel Bell 014
CV164=2 GE M 6731022A Steel Bell 023
CV164=3 GE M 6731022A Steel Bell 024
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
2nd Generation Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe
CV165=1 Cast Iron Shoe
GE Dash 7 Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 B36-7 Air Dryer 1
CV166=1 B30-7 Air Dryer 1
CV166=2 C30-7 Air Dryer 1
CV166=3 C30-7 Air Dryer 2
S0713 - Release Notes
===================================================
V-3 R-3:
===================================================
- description mispelling fix
- description brake squeal error fix
- soundslot brake squeal spelling mistake
- remastered prime mover
- prime mover volume selection mode
- brake 1 and 2 settings change
- brake set/release change
- traction motor update Hide description more…
H0 N XL L M4
- Article numbers
- S0713
- Last change
- 7/8/2026
- Manufacturer
- ESU
EMD 8-567C NT H0 N XL L M4
- Article numbers:S0819
- Last change: 5/21/2026
- Manufacturer: ESU
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 8cyl version of the 567 would be appropriate for the following locomotives:
SW8, SW900, G8, GA8, GL8, JL8, And others.....
Recorded from a EMD SW8
This project is a normal idle version. It is an air throttle version. It has switcher type exhaust with a single exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual nothing. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
1st Generation Switcher Horn Pack 1
Horns (SoundCV9):
CV163=0 Handcock 4700 Whistle (Temp No Loop)
CV163=1 Leslie A-125
CV163=2 Leslie A-200
CV163=3 Leslie S-25 (Temp Leslie S-2M)
CV163=4 Leslie S-2M
CV163=5 Leslie S-3K
CV163=6 Leslie S-3L
CV163=7 Nathan M-3
CV163=8 Nathan M-5
CV163=9 Nathan P-2 (Temp Nathan P-3-OC)
CV163=10 Nathan P-3-OC
CV163=11 Nathan P-5-OC
CV163=12 Wabco A2
CV163=13 Wabco AA-2 (Temp Wabco A2)
CV163=14 Wabco E-2
EMD 1st Generation Switcher Bell Template Pack 1
Bells (SoundCV10):
CV164=0 EMD 8004156 Bronze Bell 007
CV164=1 EMD 8475495 Steel Bell 011
CV164=2 EMD 8004156 Bronze Bell 008
CV164=3 EMD 8475495 Steel Bell 034
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
Switcher Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe #1
CV166=1 Cast Iron Shoe #1
EMD 1st Generation Switcher Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 NW2 Air Dryer 1
CV166=1 NW5 Air Dryer 1
CV166=2 SW7 Air Dryer 1
CV166=3 SW10 Air Dryer 1 Hide description more…
H0 N XL L M4
- Article numbers
- S0819
- Last change
- 5/21/2026
- Manufacturer
- ESU
Dual CAT 8-D17000 H0 N XL L M4
- Article numbers:S0544
- Last change: 2/2/2026
- Manufacturer: ESU
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 efficiencies the new diesel locomotives offered compared to their steam counterparts: reduced labour intensity. In the 1940s, the steam to diesel transition was in its infancy in North America, and railroad unions were trying to protect the locomotive fireman jobs that were redundant with diesel units. One measure taken to this end was a stipulation that locomotives weighing 90,000 pounds (41,000 kg) or more required a fireman in addition to an engineer. The 44-ton locomotive was born to skirt this requirement. Other manufacturers also built 44-ton switchers of center-cab configuration. 348 examples of this locomotive were built for North American railroads. Many remain, in service and in museums.
Recorded from a GE 44-Tonner
This project is a normal idle version. It is an air throttle version. It has a single exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
1st Generation Switcher Horn Pack 1
Horns (SoundCV9):
CV163=0 Handcock 4700 Whistle
CV163=1 Leslie A-125
CV163=2 Leslie A-200
CV163=3 Leslie S-25
CV163=4 Leslie S-2M
CV163=5 Leslie S-3K
CV163=6 Leslie S-3L
CV163=7 Nathan M-3
CV163=8 Nathan M-5
CV163=9 Nathan P-2
CV163=10 Nathan P-3-OC
CV163=11 Nathan P-5-OC
CV163=12 Wabco A-2
CV163=13 Wabco AA-2
CV163=14 Wabco E-2
CV163=15 Nathan K-3L
GE Switcher Auto Bell On/Off Trigger Template Pack 1
Bells (SoundCV10):
CV164=0 GE 45-Tonner Air Bell
CV164=1 GE M 6731022A Steel Bell 017
CV164=2 GE M 6731022A Steel Bell 027
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
Switcher Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe #1
CV165=1 Cast Iron Shoe #1
ALCO Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 S-1 Air Dryer 1
CV166=1 C-425 Air Dryer 1
CV166=2 RS-18 Air Dryer 1
CV166=3 RS-18 Air Dryer 2
S0544 - Release Notes
===================================================
V-3 R-3:
===================================================
- description mispelling fix
- description brake squeal error fix
- soundslot brake squeal spelling mistake
- remastered prime mover
- prime mover volume selection mode
- brake 1 and 2 settings change
- brake set/release change
- traction motor update Hide description more…
H0 N XL L M4
- Article numbers
- S0544
- Last change
- 2/2/2026
- Manufacturer
- ESU
ALCO 16-251C H0 N XL L M4
- Article numbers:S0709
- Last change: 1/19/2026
- Manufacturer: ESU
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 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.
Our recording is from a 16cyl 251C and could be found in the following locomotives:
C425, C628
Other locomotives using variations of the 16cyl 251 prime mover included:
RS27, C424, C430, RSD-15, C630, C636, WDM-2 (Indian Railways)
Recorded from a ALCO C-425
This project is a normal idle version. It has a single exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
Prime Mover Start Type
Air Start (Default):
CV31 = 16, CV32 = 1
----------------------
CV263 = 0
Electric Start:
CV31 = 16, CV32 = 1
----------------------
CV263 = 1
1st Generation Horn Pack 2
Horns (SoundCV9):
CV163=0 Leslie S-3J
CV163=1 Leslie S-3K-R
CV163=2 Leslie RS-3L
CV163=3 Leslie S-5T-F
CV163=4 Leslie S-5T-R
CV163=5 Leslie S-5T-RRO
CV163=6 Leslie SL-4T
CV163=7 Nathan K-5LA
CV163=8 Nathan M-3H-R2
CV163=9 Nathan M-3-R1
CV163=10 Nathan M-3-RT1
CV163=11 Nathan M-5-R24
CV163=12 Wabco A-2
ALCO Bell Template Pack 1
Bells (SoundCV10):
CV164=0 ALCO Bronze Bell 003
CV164=1 ALCO Bronze Bell 005
CV164=2 ALCO Bronze Bell 006
CV164=3 ALCO Bronze Bell 010
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
1st Generation Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe #1
CV165=1 Cast Iron Shoe #1
ALCO Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 S-1 Air Dryer 1
CV166=1 C-425 Air Dryer 1
CV166=2 RS-18 Air Dryer 1
CV166=3 RS-18 Air Dryer 2
S0709 - Release Notes
===================================================
V-4 R-4:
===================================================
- description mispelling fix
- description brake squeal error fix
- soundslot brake squeal spelling mistake
- remastered prime mover
- prime mover volume selection mode
- air start/electric start selection mode
- brake 1 and 2 settings change
- brake set/release change
- traction motor update
Hide description more…
H0 N XL L M4
- Article numbers
- S0709
- Last change
- 1/19/2026
- Manufacturer
- ESU
ALCO 8-251F H0 N XL L M4
- Article numbers:S0769
- Last change: 1/16/2026
- Manufacturer: ESU
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 1500 horsepower 8cyl version of the 251F could be found in the following locomotives:
C-415
The C415 was a large switcher or small road switcher equipped with a raised cab mounted slightly off-center, with a lower, narrower hood on either side. The longer one contained the diesel engine, a 1,500 hp (1.1 MW) eight-cylinder turbocharged Alco 251-F, while the shorter contained auxiliaries. The C415 could be ordered with three different cab heights; a low one for minimum clearances, a regular height one, and an extra-height one for maximum visibility.
Trucks fitted were either Type B road trucks or ALCO Hi-Ad (high adhesion).
Recorded from an ALCO C-415
This project is a normal idle version. It has a single exhaust stack.
File also contains an "Isolation Switch" Mode on F15 when Standing Still.
Pressing F15 while not moving will lower the prime mover and lock the motor. F15 must be turned off to begin moving.
Another Mode is "Reverser In Center Position". When pressing F24 while stopped, the motor will lock so you can throttle through the notches like the prototype in neutral. F24 must be turned off to begin moving.
This project has "Run 8" mode. When turning on F26 with F28 off, the prime mover goes to run 8. Turning off F26 returns the prime mover sounds back to normal mode.
This project has "Coast" mode. When turning on F27 with F28 off, the prime mover goes to idle for coasting purposes. Turning off F27 returns the prime mover sounds back to normal mode.
You can still use F26 and F27 for manual notching. You have to keep both F26 and F27 off before pressing F28 to turn on manual notching. Once F28 is on, you can use F26 to notch up and F27 to notch down. F26, F27, and F28 must be turned off to return to normal mode.
This project has "Load" mode. When turning on F29 with F15, F24, F26, F27, F28 off, the prime mover goes into load mode. While you are using load mode, the prime mover will notch up 1 or more notches based on primary load settings(CV104). The throttle notches up using speed instead of requested speed while using the load feature. F29 must be turned off to return to normal mode.
Prime mover volume selection mode. By default the prime mover has volume dynamics. Meaning idle is soft while notch 8 is loud. This is very prototypical. The next option is volume maxed out. Meaning idle and notch 8 are the same volume. This is more suitable for people who like it loud.
Change the sound configuration of the prime mover sound slot 1
CV31 = 16, CV32 = 1
----------------------
CV263 = 0 Prime Mover Dynamic Volume Control
CV263 = 1 Prime Mover Max Volume
1st Generation Switcher Horn Pack 1
Horns (SoundCV9):
CV163=0 Handcock 4700 Whistle
CV163=1 Leslie A-125
CV163=2 Leslie A-200
CV163=3 Leslie S-25
CV163=4 Leslie S-2M
CV163=5 Leslie S-3K
CV163=6 Leslie S-3L
CV163=7 Nathan M-3
CV163=8 Nathan M-5
CV163=9 Nathan P-2
CV163=10 Nathan P-3-OC
CV163=11 Nathan P-5-OC
CV163=12 Wabco A-2
CV163=13 Wabco AA-2
CV163=14 Wabco E-2
CV163=15 Nathan K-3L
ALCO Bell Template Pack 3
Bells (SoundCV10):
CV164=0 ALCO Bronze Bell 004
CV164=1 ALCO Bronze Bell 007
CV164=2 ALCO Bronze Bell 009
CV164=3 ALCO Bronze Bell 012
CV164=4 ALCO Bronze Bell 013
Auto Bell:
Many Second and Third Generation locomotives have been fitted with an Automatic Bell that is triggered when the horn is blown. In MANY cases this cannot even be bypassed on modern locos. Before the FRA mandated this feature on new locomotives the bell was of course turned on and off separately. Some locomotives were delivered with a manual bell and have been converted to an automatic bell. This creates a challenge in sound file creation.
We realize that not every loco with a particular prime mover had this feature. As such we have built in an option to turn the feature on and off. We will set the default in the file to be what is most appropriate for the particular file.
To turn the feature OFF - Auto Bell OFF:
1. Remove the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 4
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 0
To turn the feature ON - Auto Bell ON:
1. ADD the Auto bell sound slot from the function mapping chart
CV31 = 16, CV32 = 8
----------------------
CV311 = 12
2. Change the sound configuration of the Auto bell sound slot
CV31 = 16, CV32 = 1
----------------------
CV287 = 1
Auto Bell Timer:
The Bell timer is amount of time the bell will play after the horn if the auto timer is active. The timer is broken down into 1/4 of a second increments.
CV169=4 - 1 Second
CV169=8 - 2 Seconds
CV169=12 - 3 Seconds
CV169=16 - 4 Seconds
CV169=20 - 5 Seconds - Default
Etc...
Switcher Brake Squeal Template Pack 1
Brake Squeal (SoundCV11)
CV165=0 Composition Shoe #1
CV165=1 Cast Iron Shoe #1
ALCO Air Dryer Template Pack 1
Air Dryer (SoundCV12)
CV166=0 S-1 Air Dryer 1
CV166=1 C-425 Air Dryer 1
CV166=2 RS-18 Air Dryer 1
CV166=3 RS-18 Air Dryer 2
S0769 - Release Notes
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V-4 R-4:
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- description mispelling fix
- description brake squeal error fix
- soundslot brake squeal spelling mistake
- remastered prime mover
- updated prime mover comment
- prime mover volume selection mode Hide description more…
H0 N XL L M4
- Article numbers
- S0769
- Last change
- 1/16/2026
- Manufacturer
- ESU
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