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Before the SD70 MAC made its appearance at the beginning of the 1990's, the standard for diesel engines was a DC traction motor. However, with more horsepower and increased traction to the rails, AC power has become the more desirable alternative.

General Motors' EMD railroad division received its first major bid from the Burlington Northern (BN) which invested $675 million to make 350 SD70 MACs. In December 1993, BN received its first MAC and ushered in a new era of diesel motive power. Since then, the BN has merged with the Santa Fe to form the BNSF.

FEATURES:

• Proto-Sound® Digital Sound with Squeaking Brakes and Freight Yard sounds (see more below)
• Operating diesel exhaust smoke
• 2-precision flywheel equipped motors
• 1/4" Scale detail and dimensions
• All-metal wheels & gears
• Compatible with most AC transformers
• Proto-Sound® electronic reverse unit
• Die-cast 6-wheel trucks
• Intricately detailed ABS body
• Directional constant voltage headlights
• Die-cast trucksides, pilot & fuel tank
• Lighted cab interior
• Cab engineer figures
• Remote controlled Proto-Couplers®
• Stamped metal floor
• Operates on O-31 or greater curves
• Length: 18-1/2"

Proto-Sound® Features:

• Variably controlled 8-level diesel sound
• Authentic diesel horn
• Authentic diesel bell
• Squeaking brakes
• Randomly activated cab chatter sequences
• Freight yard Proto-Effects®
• Remote controlled engine volume adjustment
• Remote controlled engine direction lockout setting
• Operates with any compatible AC transformer
• Self-recharging battery backup with auto shut-off
• Directionally controlled headlights
• Constant voltage headlights
• Remote controlled die-cast metal Proto-Couplers®

This engine has been track tested to make sure that it is in proper operating condition.