PROTO 2000 Diesel EMD SD7 Powered w/Sound & DCC -- Pennsylvania #8589 (Dark Green Locomotive Enamel)

EMD SD7 is Model of First Special Duty Series Locomotive * Prototype-Specific Detailing * Magnetic Knuckle Couplers * All Wheel Drive & Electrical Pick-Up * Dual Machined Brass Flywheels * Constant & Directional Headlights * RP-25 Wheels * Heavy Diecast Chassis * Five-Pole Skew-Wound Motor * Factory-Installed Sound & DCC Sound can be operated with standard DC power pack or DCC controllers. Sound features include: Diesel Engine, Horn, Bell, Squealing Brakes, Doppler Effect, Air Let Off (in neutral), Headlight, and Trailer which mutes whistle and bell for double heading. Originally intended for use on branch lines, EMD introduced its Special Duty series in 1952 with the SD7. This loco also introduced the three-axle Flexi-Coil truck with its powered center axle. This was a major departure from earlier three-axle designs where an unpowered center axle was used to spread the engine's weight over more wheels, reducing the strain on the lighter rail and