@Hot Water posted:No. In fact ALL compound articulated "start in simple" by way of the "sampling valve", otherwise the locomotive could not start a train. Note that in the upper video, starting out, there are four distinct exhausts per revolution of the front engine (the big low pressure cylinders), while in the second video (at a higher speed), it almost sounds like one exhaust "note" is missing.
@Hot Water posted: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.
HW,
You are off base again. Read the following: "Compound Articulated Locomotives".
Engineers that I have worked noted that it wasn't necessary to "simple" an engine to start a train. This would be especially true when doing light switching.
As for the 1309 in the video, it seems to me that in the second video the train is drifting more so than pulling. My question is, why so much smoke? Even when the train stops, there is a significant amount of smoke.
