Available Items


G Gauge RailKing One Gauge SD70ACe Diesel Engine w/Proto-Sound 3.0
  • George Bush


G Gauge RailKing One Gauge SD70AH Diesel Engine w/Proto-Sound 3.0
  • Union Pacific


G Gauge RailKing One Gauge SD70AH Diesel Engine w/Proto-Sound 3.0
  • Union Pacific


G Gauge RailKing One Gauge SD70ACe Diesel Engine w/Proto-Sound 3.0
  • BNSF


G Gauge RailKing One Gauge SD70M-2 Diesel Engine w/Proto-Sound 3.0
  • Norfolk Southern


G Gauge RailKing One Gauge SD70ACe Diesel Engine w/Proto-Sound 3.0
  • Denver Rio Grande


G Gauge RailKing One Gauge SD70ACe Diesel Engine w/Proto-Sound 3.0
  • EMD


G Gauge RailKing One Gauge SD70ACe Diesel Engine w/Proto-Sound 3.0
  • Reading

G Gauge SD70ACe Diesel Locomotives Arriving December 2020

November 5, 2020 - The M.T.H. RailKing One Gauge SD70ACe Diesel Locomotives have begun shipping and more units are slated to arrive in December 2020. One of next arrivals is Union Pacific #9096 and is featured in a sneak peek video on the left side of the screen.

Electro-Motive Diesel’s SD70ACe, along with its General Electric rival, the ES44AC, inaugurated the fourth generation of diesel power. By the turn of the 21st century, the horsepower race was over and the third generation of freight diesels had found its sweet spot: a six-axle, computer-assisted, 4000–4400 horsepower locomotive with a wide, comfortable cab. Railroads viewed this as the perfect building block for multi-engine lashups to power virtually any size train. Development of the next generation of power would be born not out of railroad needs, but due to government regulations.

On January 1, 2005, the Environmental Protection Agency’s Tier-2 emissions requirements for railroad locomotives went into effect, significantly reducing the pollutants that diesels could exhaust into the atmosphere. Rather than just upgrade its existing SD70MAC to meet Tier 2 requirements, EMD took the opportunity to design a new locomotive from the rails up.

Emissions turned out to be the easy part. Only slight modifications were needed to make EMD’s 4300 horsepower model 710 motor meet new emission standards. With 5000 such motors in service worldwide and a reputation for dependability, EMD reasoned that shop crews would prefer familiar technology.

Other than the prime mover, however, virtually every element of the SD70ACe was re-thought to create a 21st century locomotive. Ergonomics were a prime consideration. The engine’s angular nose offers the crew far better visibility than most other locomotives, and the cab is comfortable for engineers of almost any size. Digital screens provide a range of information on what is happening both inside the locomotive and out on the road. The cab easily accommodates a crew of three — an important factor in a modern world without cabooses. And there is, of course, a cupholder for the engineer.

The SD70ACe also offers, in EMD’s words, “outstanding improvements in maintainability.” All electrical wires are on the right side of the locomotive and all piping is on the left, with most pipes and wires routed under the frame so they can be serviced by a man standing outside the engine — rather than crawling around at the bottom of the engine room.

After a year of testing on the road and at the Association of American Railroads’ test track in Pueblo, CO, the first SD70ACe’s (‘e” stands for “enhanced”) were delivered to CSX Transportation in 2004. Six of North America’s seven major Class 1 railroads, along with a number of smaller lines, ponied up to buy the new locomotives. When stricter Tier 3 emissions rules went into effect in 2012, compliance was relatively easy. By the end of production in 2014 — after new Tier 4 requirements dictated a new locomotive design — nearly 2000 SD70ACe’s were and still are hauling freight across the U.S., Canada and Mexico.

Upgrade your railroad to 21st century power with our new RailKing One-Gauge SD70ACe, the first One-Gauge model of this fourth-generation pioneer. Our accurate, full 1:32 scale model is loaded with added-on details, including separate grab irons and windshield wipers, hand-painted crew figures, see-through metal grilles and moveable roof fans.

Under the hood are powerful twin motors and our Proto-Sound 3.0 sound and control system, featuring sounds recorded from an actual Union Pacific SD70ACe; conventional and DCS control as well as full 28-function DCC operation; variable intensity diesel exhaust smoke; and LED lighting effects that include directionally controlled headlights, cab illumination, and flashing ditch lights. And in DCS operation, you can easily double- or even triple-head an SD70ACe with any other M.T.H. steam or diesel locomotive. If you’re looking for realism and a lot of fun in a modern locomotive, it doesn’t get any better than this!

Click on any of the offerings on the left side of the page to learn more about the features and where to buy.

Product Features

  • Intricately Detailed, Durable Polycarbonate Body
  • Detailed Truck Sides & Pilots
  • 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) Hook & Chain Coupler Assemblies
  • (2) Remote-Controlled Proto-Couplers
  • G 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
  • Operating LED Ditch Lights
  • (2) Powerful 5-Pole Precision-Flywheel Equipped Skew-Wound Balanced Motors
  • Operating ProtoSmoke Diesel Exhaust
  • Onboard DCC/DCS Decoder
  • Locomotive Speed Control In Scale MPH Increments
  • 1:32 Scale Proportions
  • Proto-Sound 3.0 With The Digital Command System Featuring Quillable Horn With Passenger Station Proto-Effects
  • Unit Measures: 28" x 3 3/4" x 6 1/4"
  • Operates On R2 (1560mm/61.5" Diameter) 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