@bbunge posted:If you listen carefully on the first video, most of the diesel noise is coming from the power car just in front of the F-40. A guess is the F-40 was there for the dynamic brakes going back downhill.
Figure they are learning on the job when it comes to transition from simple to compound or even just deciding if the valves are working correctly.
Remember that there is no "manual control" of changing from simple to compound. I believe the N&W Y6 class compound articulated steam locomotives were the only ones that were set-up so that the Engineer could manually introduce "live superheated steam" into the low pressure cylinders, for long sustained low speed pulls.
Looking forward to seeing this brute working hard first hand. Spent a lot of time looking her over when she was at the museum some years ago.
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