Re: Minimum length on Non-reversing segment

Don Vollrath

A short section of fixed polarity track between two AR sections needs to be only as long as it takes for the leaving or entering AR controllers to recognize that a polarity correction is needed, and do so as an offending truck with multiple connected axles and wheels rolls through. So making the fixed polarity section only as long as a multi axle passenger or diesel truck should be sufficient.
Note that once the “leaving” AR section has flipped to agree, it is Essentially out of the picture as that same truck crosses from the fixed polarity section and begins to enter into the next AR section, and causes it to correct that polarity if necessary.


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