RobS
Super Member
"SP 4449 was built in 1941 as a GS-4 "Northern" type locomotive. A 4-8-4 wheel arrangement, she is 110' long, 10' wide and 16' tall. The locomotive and tender weighs 433 tons, and it operates with a boiler pressure of 300 psi. Her eight 80" diameter drivers and unique booster truck can apply 5,500 horsepower to the rails and exceed 100 mph."
Those are impressive stats, to say the least.![]()
I looked through some of the photo galleries including a bearing replacement on one of the main driver axles. Impressive for sure. I'd say one of the main driver connecting rods probably weighs more than my tractor!