In 1958, GM's Electro-Motive Division took a great technological stride forward with the introduction of the turbo-charged SD24. In turbocharged engines, exhaust gases are used to increase cylinder air pressure, thus effectively increasing horsepower. In fact, an engine that produced 1800 horsepower when normally aspirated could produce 2400 horsepower when turbocharged. In addition to the extra power, turbocharged engines run well at different altitudes, which makes them ideal for railroads that travel varied terrain. The SD24s were close relatives of the popular GP-series engines. They had similar horsepower and the same style body. The primary difference was that SD-series (for "Special Duty") engines were lengthened to make room for three-axle, three-motor trucks. These extra wheels gave SD engines more tractive effort and distributed their weight more widely than did GPs. For this reason, the SD24 and others in the series were ideally suited for secondary lines with lighter rail. M.T.H. is proud to introduce this landmark engine in our Premier line. It is available in the markings of the Burlington Northern, Electro Motive Demonstrator, Santa Fe, Southern, Western Pacific railroads and comes with an impressive set of features.
- (2) Remotely Controlled Proto-Couplers - Metal Chassis - (2) Precision Flywheel Equipped Motors - Locomotive Speed Control - Illuminated Number Boards - Intricately Detailed ABS Body - Directionally Controlled Headlights - Die-Cast Truck Sides, Pilots and Fuel Tank - Authentic Paint Scheme - Metal Handrails and Decorative Horn - Lighted Cab Interior - Lighted Marker Lights - (2) Engineer Cab Figures - Spinning Roof Fans - Metal Body Side Grilles - Operating Smoke Unit - Metal Wheels, Axles and Gears - Proto-Sound 2.0 With The Digital Command System Featuring:- Freight Yard Proto-Effects - Unit Measures:15 3/8" x 2 5/8" x 4" - Operates On O-31 Curves
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