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MTH 20-21018-1 - GP-40 Diesel Engine "Indiana Railroad" w/ PS3 (Hi-Rail Wheels)

MTH 20-21018-1 - GP-40 Diesel Engine "Indiana Railroad" w/ PS3 (Hi-Rail Wheels)

MTH Electric Trains

  • 44996
  • Save $ 49

Product Specification:

  • Road Name: Indiana Railroad
  • Road Number: 3001
  • Product Line: Premier
  • Scale: O Scale
  • Estimated Release: Dec. 2018


  • Intricately Detailed, Durable ABS Body
  • Die-Cast Truck Sides, Pilots and Fuel Tank
  • Metal Chassis
  • Metal Handrails and Horn
  • Moveable Roof Fans
  • Metal Body Side Grilles
  • Detachable Snow Plow
  • (2) Handpainted Engineer Cab Figures
  • Authentic Paint Scheme
  • Metal Wheels, Axles and Gears
  • (2) Remote-Controlled Proto-Couplers
  • O Scale Kadee-Compatible Coupler Mounting Pads
  • Prototypical Rule 17 Lighting
  • Directionally Controlled Constant Voltage LED Headlights
  • Lighted LED Cab Interior Light
  • Illuminated LED Number Boards
  • Lighted LED Marker Lights
  • (2) Precision Flywheel-Equipped Motors
  • (2) Operating ProtoSmoke Diesel Exhaust Units
  • Onboard DCC/DCS Decoder
  • Locomotive Speed Control In Scale MPH Increments
  • Proto-Scale 3-2 3-Rail/2-Rail Conversion Capable
  • 1:48 Scale Proportions
  • Proto-Sound 3.0 With The Digital Command System Featuring Freight Yard Proto-Effects
  • Unit Measures: 15 1/2" x 2 3/4" x 4"
  • Operates On O-31 Curves 
Diesel DCC Features
  • F0 Head/Tail light
  • F1 Bell
  • F2 Horn
  • F3 Start-up/Shut-down
  • F4 PFA
  • F5 Lights (except head/tail)
  • F6 Master Volume
  • F7 Front Coupler
  • F8 Rear Coupler
  • F9 Forward Signal
  • F10 Reverse Signal
  • F11 Grade Crossing
  • F12 Smoke On/Off
  • F13 Smoke Volume
  • F14 Idle Sequence 3
  • F15 Idle Sequence 2
  • F16 Idle Sequence 1
  • F17 Extended Start-up
  • F18 Extended Shut-down
  • F19 Rev Up
  • F20 Rev Down
  • F21 One Shot Doppler
  • F22 Coupler Slack
  • F23 Coupler Close
  • F24 Single Horn Blast
  • F25 Engine Sounds
  • F26 Brake Sounds
  • F27 Cab Chatter
  • F28 Feature Reset


    Both under the hood and under the frame, the GP40 exemplified EMD's product line in transition. Along with its less-powerful sister, the GP38, the Geep 40 was the first EMD locomotive with the model 645 diesel motor. Its predecessor, the 567 diesel that had powered EMD locos since the late 1930s - named for its 567 cubic inch displacement per cylinder - had become inadequate to meet customers' demands for higher horsepower.

    Remarkably, the 645 was the same external size and weight as the motor it replaced, with the power increase achieved largely by increasing the cylinder bore. In its normally aspirated form, with a Roots blower pressurizing the incoming air, a 16-cylinder 645 cranked out 2000 horsepower; this was the motor in the GP38. The same engine with a turbocharger, however, put out 3000 hp in the GP40, with lower fuel consumption and emissions and improved high-altitude performance; the tradeoff was higher maintenance costs for turbo-equipped engines.

    A design problem with turbochargers is "turbo lag": because the turbo's air compressor is powered by engine exhaust gas, the turbo doesn't become effective until the engine gets up to speed. In Alco diesels, this issue produced thick black smoke as the motors ramped up, earning them the nickname "honorary steam engines." In the 645 motor, EMD's engineers solved the problem with a gear train and over-running clutch, which drove the turbo at low engine speeds until the exhaust gas took over.

    While the GP40 heralded the introduction of a new motor, it also marked the beginning of a long goodbye to the four-axle road diesel. Under the frame, railroads were seeing that six-wheel trucks, once an expedient for spreading out engine weight on lighter-duty track, were more suited to the increasing tonnage and speed of modern freight service. The GP40 and its successor, the GP40-2, were the last high-horsepower, four-axle Geeps to sell in large quantities. During a six-year production run that began in 1965, over 1200 GP40s were sold to U.S., Canadian and Mexican railroads. Notably absent from the list of original owners, however, were western heavy haulers Santa Fe and Union Pacific; both roads purchased fleets of six-axle EMD SD40s and SD40-2s. Although the lighter-duty, four-axle GP38 series continued to be a strong seller, the transition to the six axle, high-horsepower unit - which would become the standard road diesel of the 21st century - began in the era of the GP40

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