WalthersMainline HO EMD SD70ACe, Standard DC
Union Pacific Heritage D&RGW #1989
Walthers Item #910-9822
- Limited edition – one time run of these roadnumbers!
- Model today’s railroading at WalthersMainline prices
- One of the backbones of contemporary loco fleets
- Prototypes in service 2005 to the present
- Easily handles 18″ radius curves (22″ or larger recommended)
- Upper or lower headlight per prototype
- Working front ditch lights
- Fully assembled
- 9-Pin DCC plug
- Same powerful drive as WalthersProto(R) locos featuring:
- 5-pole skew-wound motor
- 14:1 gear ratio
- Helical-cut gears for quiet operation and easy multiple unit operation
- All-wheel drive and electrical pickup Dual machined brass flywheels
- Heavy die cast metal chassis
- Constant and directional lights
- Molded drill starter points for grab irons (sold separately)
- RP-25 metal wheels
- Proto MAX(TM) metal knuckle couplers
The SD70ACe is the successor to the older SD70MAC. Built from 2004 to 2014 in the United States, the SD70ACe was originally designed to comply with EPA Tier 2 locomotive emissions regulations. Beginning in 2012, newly built SD70ACe’s were EPA Tier 3 compliant. SD70ACes are equipped with EMD’s 16-710-G3C-T2 prime mover, rated at 4,300 horsepower (3,200 kW); later Tier 3 models are rated at 4,500 horsepower (3,400 kW). They are rated at 157,000 lbf (700 kN) continuous tractive effort (191,000 lbf (850 kN) starting). Braking effort is rated at 106,000 lbf (470 kN).
Although mechanically similar to earlier SD70 units, the SD70ACe rides on a new underframe and uses mostly new sheet metal above the frame. Electrical cables and air lines have been routed beneath the walkways on opposite sides, allowing easier access for maintenance. Continuing the designs of the SD80 and SD90 series, the radiator on the locomotive is nearly as wide as the cab, the center hood section is a step down below the roofline, and the dynamic brakes have been moved to the rear of the hood. The SD70ACe uses the cab design of late-model SD90MAC-H units, which uses rectangular window glass and is externally different from the two cab variations used on earlier SD70M and SD70MAC units. In 2008, EMD standardized the isolated cab on subsequent SD70ACe’s after non-isolated cab units were restricted from leading on BNSF Railway due to excessive cab vibration.