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Double headed locomotives require speed matching to run well together, especially true for switching. I used page 50 in the NCE PowerCab manual rev.1.65 . Control Variables ( CV''s ) should be changed in programming mode so that the initial setting of a CV ( Cryptic Vexation? ) can be recorded. I chose to not modify the CV's of a Broadway Limited 2-8-0 steam locomotive, matching the CV's of a Bowser diesel to it. I later repeated the process with two Bachmann Sound Value Alco model diesels. I was slightly surprised that out of the box the FA2 ran much faster than the RS3. Perhaps prototypical, but undesirable. Most surprising was that the CV's mostly read 0 ! With trial and error the two were adjusted to match the 2-8-0. There are more sophisticated ways to speed match, this has been adequate for my purposes. I think Joe Fugate's next "Run Like a Dream" locomotive book will include sophisticated alternatives.
Google Spreadsheets are a good resource with some fancy functionality, in this case I used only the grid to keep track of CV's. Should CV's go awry and things not work, there's always lucky option 7 for recovery programming, seen on page 54 of the NCE manual. Remember, option 7 also resets the loco id to 3 !
This article first appeared on model-railroad-hobbyist.com
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