Description
Railroad Short Name: SP
The debut of the SD9 in 1954 marked the next step forward for EMD’s Special Duty line of six-axle diesels. Except for the placement of the class lights, the SD9 looked almost the same as the SD7 introduced in 1952. But under the hood, the new 567C prime mover delivered 1,750 horsepower. While four-axle power still dominated overall sales, the SDs were soon drawing well-deserved attention. In service, the three-axle Flexicoil trucks delivered almost twice the pulling power of their GP counterparts, proving ideal for demanding assignments in helper, yard, transfer and heavy freight service. With its weight spread over six axles, the SD9 was also well suited to lightly built routes, and many were purchased especially for branch line duties. By the time production ended in 1959, 515 SD9s were in service on over a dozen railroads. Some are still going strong after 50+ years of service!
Based on Phase II (also known as Phase 2) units in service from 1955 to 1965 with:
- Nathan P3 air horn
- Whip-style radio antenna
- 5 Light package with:
- Square Mars “Undesired Emergency” red light (non-operating on DC units
- Dual Mars warning light (Forward only on DC units)
- Mars dual sealed beam headlights
- SP style plows
- Rolled-style handrail stanchions
- Standard style uncoupling levers
From superb paint and lettering to railroad-specific details, WalthersProto SD9 locos come ready for service and feature:
- 5 pole, skew-wound, high-torque, high-efficiency can motor
- Helical gears with 14:1 ratio for smooth, quiet running
- Easy multiple-unit operation
- Superb paint and lettering
- LED constant and directional headlights
- Heavy die-cast metal underframe
- Proto MAX(TM) metal knuckle couplers
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