@Ed Mullan posted:Could it be that she's operating in simple from a start at Helmstetters, and compound in the second video?
Ed
No. In fact ALL compound articulated "start in simple" by way of the "simpling 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.
