Missouri Pacific Alco RS-3
 
O Scale by Sunset Models 3rd Rail
 
Classic Blue & White and Jenks Blue (GP12) Schemes Offered
The Missouri Pacific Railroad relied heavily on its RS-3 fleet for road, local, and branchline service across the system, making these locomotives a familiar sight from the 1950s through the Jenks modernization era. Delivered new in the railroad’s striking blue-and-white scheme, Missouri Pacific RS-3s later evolved through rebuild programs that aligned them visually and operationally with the railroad’s GP12 fleet.
 
Sunset Models now brings these iconic Mopac road switchers to O Scale, offering both as-delivered Classic RS-3sand Jenks Blue rebuilds, allowing modelers to accurately represent multiple eras of Missouri Pacific diesel operation.
 
Prototype Background
Missouri Pacific RS-3s were delivered in the early 1950s and quickly became versatile performers, handling everything from yard switching to mainline freight. As the railroad modernized under the Jenks program, some units were rebuilt and renumbered, receiving the famous Jenks Blue paint and mechanical updates that aligned them with GP12 standards. While retaining their RS-3 appearance, these rebuilds took on new identities—both visually and sonically.
One standout survivor, MP 4502, remains preserved today at the National Museum of Transportation in St. Louis, serving as a tangible reminder of the railroad’s classic diesel era.
 
Versions Offered
Classic Blue & White RS-3
Represents Missouri Pacific RS-3s as delivered, ideal for early diesel and transition-era layouts.
Road Numbers Offered:
4502 – Preserved example, classic blue and white
4523
992
Jenks Blue RS-3 / GP12 Rebuilds
These locomotives represent RS-3s rebuilt under Missouri Pacific’s Jenks program. While visually identical to RS-3s, they are considered GP12-class rebuilds and operated accordingly.
Road Numbers Offered:
1086
1078
1096
Jenks Blue versions feature EMD 567 sound profiles to accurately reflect their rebuilt GP12 mechanical configuration.
 
Model Features
High-detail plastic body with accurate RS-3 proportions and Mopac-specific details
Correct cab, hood, and short-hood tooling for both Classic and Jenks configurations
Die-cast metal chassis and trucks for proper weight and smooth performance
Separately applied detail parts including handrails, grab irons, horns, and lift rings
Detailed cab interior with crew figures where appropriate
Crisp factory-applied paint and lettering matched to Classic and Jenks eras
Advanced electronics: 3R ERR Cruise/TMCC/Railsounds compatible with TMCC/Legacy/DCS, 3R Conventional for your choice of sound, and 2R ESU Loksound 5.0. 
• OEM Blunami Upgrade Option Available in both 2-Rail and 3-Rail
Blunami available as an OEM upgrade in both 2-Rail and 3-Rail, operating as a standalone system controlled via Apple or Android app
Jenks Blue GP12 versions equipped with EMD 567 sound files for prototype accuracy
 
A Mopac Diesel Icon
From classic blue-and-white locals to Jenks-era rebuilt power, the Missouri Pacific RS-3 tells the story of a railroad constantly adapting to change. With preserved history, rebuilt identities, and unmistakable Mopac character, these locomotives are essential additions to any serious Missouri Pacific roster.