The Pacific-type locomotive evolved as the need for power and speed increased. First, the four-wheel leading truck delivered stability at the faster speeds. Second, six tall drivers provided pulling power and speed.  Last, a two-wheel trailing truck provided support for a larger firebox. The sum of this design was the 4-6-2 USRA Pacific.

The USRA designation for light and heavy locomotives was a function of the track's ability to withstand weight. Excessive axle weight could damage the rails, loosen fastenings, and also cause damage to the locomotive. The USRA deemed a maximum of 54,000 pounds per axle as a light locomotive. The USRA Light Pacific weighed in at 277,000 lbs, with a 73 inch driver diameter and a boiler pressure of 200 lb/in.

BLI's models follow the original designs closely. Railroad specific variations are not modeled on these locomotives. In most instances we offer two locomotive numbers for each railroad, and we are offering a painted model (black) with no lettering.  
 
INDUSTRY LEADING FEATURES:

- All new Paragon2 sound and control system for DC & DCC
- Integral DC/DCC dual mode decoder for ease of operation
- Industry best slow-speed operation in DC and DCC
- Prototypical light operation with headlight and cab light
- Authentic USRA Pacific sounds! Controllable in DC and DCC.
- All-wheel drive and all-wheel electrical pick-up (except front and trailing trucks)
- Factory installed engineer and fireman figures

PRODUCT INFORMATION:

- ABS plastic body with heavy die cast chassis for maximum tractive effort
- 5-pole can motor with skew wound armature
- Locomotive Length (coupler to coupler):  TBA
- Locomotive Weight: TBA
- Separately applied handrails, grab irons, ladders, whistle, and brass bell
- Operating knuckle couplers
 - Operates on Code 70, 83, and 100 rail
- Recommended Minimum Radius: 18 inches