IORE - The World’s Most Powerful Electric Locomotive
- langemat
- Jun 30
- 3 min read
The IORE is one of the most formidable electric locomotives ever built - an engineering answer to the harsh, demanding world of Scandinavian heavy‑haul iron‑ore transport. Delivered between 2000 and 2014 by Adtranz and later Bombardier, the fleet consists of 34 single units permanently paired into 17 double locomotives, each weighing a massive 360 tonnes and delivering a combined continuous output of 10,800 kW. Designed for the Iron Ore Line between Kiruna and Narvik, the IORE operates in an environment where winter temperatures routinely plunge far below freezing and steep gradients of up to 11% challenge even the strongest machines. Yet these locomotives thrive here, hauling trains of 8,600 tonnes - 68 heavy hopper wagons loaded with LKAB’s (Luossavaara‑Kiirunavaara Aktiebolag, state‑owned Swedish mining company) iron ore - across the mountains with a starting tractive effort of 1,200 kN. In this combined mode, the IORE is the longest and strongest electric locomotive in the World.
Beyond their headline power figures, the IORE hides several fascinating details. Each double unit uses a Co’Co’ + Co’Co’ wheel arrangement, giving it twelve driven axles for maximum adhesion on icy rails. The locomotives were engineered so robustly that they can maintain scheduled operations even if three of their twelve traction motors fail, a redundancy level rarely seen in locomotive design. Their control systems allow up to six units to be operated from a single cab, enabling enormous multi‑locomotive consists when ore output peaks.
Despite their enormous size, the IORE locomotives are surprisingly energy‑efficient. They use regenerative braking to feed power back into the grid during long downhill runs toward Narvik. Today, IORE‑hauled trains account for a significant share of Sweden’s total rail freight, underscoring how these giants quietly sustain one of Europe’s most important raw‑material supply chains.
This MOC represents the IORE in its real‑world double‑traction configuration, with one powered unit and one unpowered unit that behaves like a wagon being pulled behind it. Thanks to two train motors and six additional weight bricks, the IORE already delivers impressive pulling power. If you ever wish to motorize the second unit as well, the design fully supports it - all necessary mounting points are already in place. You would only need two extra motors, six more weight bricks, and an additional battery box to further increase the locomotive’s tractive effort.
Due to its immense length of over one meter and the resulting overhang in curves, I strongly advise against running the locomotive on R40 or R56 radii. From R72 upward, it begins to look and perform properly.
For the mountain motif applied to one side of the locomotive, I chose to use stickers. This preserves the smooth surface of the side walls - something that would not have been achievable with brick‑built techniques without compromising the look and the fine angles of the artwork. I believe this is a good and practical compromise for most builders.
MOC stats:
Length: 133.2 studs, 1042 mm
Width: 9.5 studs, 76 mm
Height: 15.0 studs, 120 mm
Weight: 2.7 kg
Parts: 2838
I’ve put together a detailed, step‑by‑step building guide for you. Throughout the instructions, you’ll find small comments and helpful hints - little signposts to make the trickier steps easier and more enjoyable.
At the end of the guide, you’ll find a visual parts list so you can quickly see everything that goes into the model.
If this build includes stickers, I’ve prepared two print‑ready sheets for you:
• a PDF you can print at home, and
• an Adobe Illustrator file for professional print shops.
You’ll also get the full parts list as a CSV file. This makes it simple to check which pieces you need and to prepare your order on common brick‑trading platforms.
Disclaimer: Please build responsibly. I cannot take responsibility for any damage or injury to parts or individuals that may occur while following these instructions. You follow at your own risk.
Link to the instruction and sticker files:
Link to more pictures of the model:
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