The RS-1 was introduced by ALCO in March of 1941 with the delivery of the first of two units to the Rock Island. Combining the accessibility of a switching locomotive and the higher-speed tracking of a road unit, the RS-1 started a revolution in locomotive design that was soon embraced by all of the major diesel-electric builders. Despite ALCO's own introduction of higher horsepower roadswitchers, the 1,000 h.p. RS-1 had a production span of 19 years (1941-1960) with 623 units.

Each O RS-1 Locomotive Includes:

• Solid die-cast chassis, pilots, fuel tank, and detailed truck sideframes
• Highly detailed body and cab with separately-applied grab irons, piping and lift rings
• Steam generator details as appropriate per road name
• All-metal separately-applied handrail stanchions
• Accurately-detailed AAR type B trucks with separately-applied brake cylinders, brake chains and other details
• Twin motors with flywheels
• Directional headlights
• Accurate painting and printing
• Weight: 5 lbs.
• Length: Approximately 14"
• Minimum diameter curve: O-36 (3-Rail)
• Minimum radius curve: 36" (2-Rail)
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3-Rail Features:

• EOB™ Speed control technology
• Operating diesel exhaust unit
• Lionel TrainMaster Command Equipped featuring RailSounds™ digital sound system (including horn, bell diesel-roar sounds, etc.); crew Talk (in command and more...
• RailSounds™ operates in both conventional and command modes
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QSI® Features (Atlas O Master 2-Rail Gold Series Locomotives Only)

• Authentic diesel engine sounds
• Squealing brakes, Doppler effect, air let-off in neutral
• Coupler impact sounds when operated with DCC
• Helper mode that mutes whistle and bell for double heading
• And more!