Bulletin: Atlas N GP40

Manufacturer: Atlas, Item number: 90811, Version: V2-R2

Atlas N Scale GP40 with 58721 LokSound 5 Micro DCC Direct "Slide-In" Decoder


90811 - No Ditch Lights
90811.2 - Front and Rear Ditch Lights - No Flash
90811.3 - Front and Rear Ditch Lights - Alternate Flash w/Horn

The EMD 645 series was an evolution of the earlier 567 series and a precursor to the later 710 series. When the 645 prime mover entered production in 1965, a large series of new locomotive models was introduced. The turbocharged version was used in EMD's 40 Series (GP40, SD40 and SD45) in 3,000 horsepower (2,200 kW), sixteen-cylinder form and in 3,600 horsepower (2,700 kW), twenty-cylinder form. EMD also introduced the Roots-blown 38 Series (GP38, SD38) and turbocharged, twelve-cylinder 39 Series (GP39, SD39). All of these locomotive models extensively share common components and subsystems, thereby significantly reducing cost and increasing interchangeability. The GP38-2 and SD40-2 became the most popular models of the series and among the most popular locomotive models ever built.

This 16cyl 645E3 with Turbo sound file would be appropriate for the following locomotives:

GP40, GP40P, GP40P-2, GP40-2, GP40X, SD40X, SD40A, SD45T-2, SD40-2, SD40-2W, SD40-2S, F40C, F40PH, F40PH-2, F40PH-2M, SDP40F, SD40-2F

Export locomotives:

GT26MC, GT26CW, GT26CW-1, GT26CW-2, GT26CU-2

Recorded from a EMD SD40-2 "Snoot Nose"

This project is a reverser based low idle version. It has a single turbo early exhaust stack.

File also contains a "low Idle" 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 go to "regular idle" and begin moving.

Another "low Idle" Mode is reverser in center position. When pressing F24 while stopped, you can throttle through the notches like the prototype in neutral. F24 must be turned off to go to "regular idle" and 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

This file is also equipped with a Smart Start feature that cycles the prime mover on and off at intervals of your choice if the throttle is left at Idle and the loco is stopped.

Smart Start (Sound CV14):
CV168=0 No Smart Start Cycle - Default
CV168=1 - 3 Minute Cycle
CV168=2 - 6 Minute Cylcle
CV168=3 - 9 Minute Cylcle
CV168=4 - 12 Minute Cylcle
Etc.....
CV168=255 - 765 Minute Cycle

Atlas GP40 Horn Pack
Horns (SoundCV9):
CV163=0 Leslie S-3L-R - Default
CV163=1 Leslie S-5T-RRO-R
CV163=2 Nathan K-2H
CV163=3 Nathan K-3H-L
CV163=4 Nathan K-3L
CV163=5 Nathan K-3LA
CV163=6 Nathan K-5HL
CV163=7 Nathan K-5H-R24
CV163=8 Nathan K-5L
CV163=9 Nathan K-5LA
CV163=10 Nathan K-5LA-R24
CV163=11 Nathan K-5L-LA
CV163=12 Nathan K-5L-R24
CV163=13 Nathan P-3
CV163=14 Nathan P-5-R24

Atlas GP40 Bell Pack
Bells (SoundCV10):
CV164=0 EMD 8475495 Steel Bell 037 - Default
CV164=1 EMD 8475495 Steel Bell 046
CV164=2 EMD 8475495 Steel Bell 056
CV164=3 Graham-White E-Bell 006
CV164=4 Graham-White E-Bell 009

Auto Bell - Default = OFF:

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

EMD 2nd Generation Air Dryer Template Pack 2
Air Dryer (SoundCV12)
CV166=0 SD40-2 Air Dryer 5
CV166=1 SD40-2 Air Dryer 6
CV166=2 SD40-2 Air Dryer 7
CV166=3 SD40-2 Air Dryer 8


Basis File S0508

KeyFunctionsSound slotsVolume CVsVolume values
F0Headlights Front/Rear
F1Bell428360
F2Horn3275128
F3Coupler529170
F4Dynamic Brake629990
F7Flange Squeal2343530
F8Prime Mover, Traction Motor, Starting Delay1, 19, 25, 26259, 403, 451, 459100, 30, 100, 60
F9Drive Hold
F10Independent Brake1133940
F11Radiator Fan831575
F12Dimmer
F14Hand Brake1436360
F15Isolation Switch2141930
F16Air Dryer On Shutdown
F17Brake Set/Release Automatic2948340
F18Sanding Valve1335520
F19Short Air Let Off2444360
F20Compressor730770
F21Air Dryer1738760
F22Cab Door1537180
F23Engine Compartment Doors1637980
F24Reverser Center2041130
F25Shutters Open/Closed3250730
F26Manual Notching Up / Run 8
F27Manual Notching Down / Coast
F28Manual Notching Logic2746720
F29Load
F30Automatic Brake1033140
F31Soundfader

Make sure that index CV31 is set to 16 and index CV32 is set to 1 before changing a volume CV.