Athearn 25741 N Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3985 DCC & Sound Servo Mount Available in several bright colors

Available in several bright colors

Where other two pole motors fail

Dimensions (Metric): 41

along with more weight

Athearn 25741 N Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3985 DCC & Sound Servo Mount Available in several bright colorsAthearn 25741 N Scale 4 6 6 4 Challenger w Oil Tender Union Pacific UP 3985 DCC & Sound The name "Challenger" was given to steam locomotives with a 4 6 6 4 wheel arrangement. This means that they have four wheels in the leading pilot truck, which helps guide the locomotive into curves, two sets of six driving wheels, and finally four trailing wheels, which support the rear of the engine and its massive firebox. Each set of six driving wheels is driven