Norfolk Southern operated Norfolk & Western J class 4-8-4 Northern type steam locomotive # 611, showing a view of it's drivers while in the yard at Atlanta, Georgia, Oct 1989

Norfolk Southern operated Norfolk & Western J class 4-8-4 Northern type steam locomotive # 611, showing a view of it's drivers while in the yard at Atlanta, Georgia, Oct 1989. The 70" drivers installed on this modern powerful streamlined steam locomotive were of conventional spoked design rather than the more modern boxpok or disc designs. These locomotives also used lightweight alloy side rods. Actually these drivers were of a small diameter size for such a large and modern locomotive. With the use of roller bearings on all locomotive axles, side rods and at other specified locations along with fine balancing of the drivers, these locomotives could obtain speeds in excess of 100 mph with a heavy passenger train. These small drivers also helped this locomotive to produce 80,000 lbs of starting tractive effort with out the use of a booster.

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