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Ian, <br /> <br />Thanks for the Link to Tony's! <br /> <br />I have been absent to the Hobby for over 30 Years, but intent to get involved again soon. I built my last layout back in the late 1960's. The demands of business and raising a family did not afford the time required to work on it, so I dismantled and sold it. <br /> <br />My occupation as a Civil Engineer did allow me to participate in the construction of the real deal though. I have been most fortunate in being asked to design some of the industrial spur lines on many Santa Fe, Southern Pacific and Union Pacific properties. <br /> <br />I noticed in your profile that you are an Electrical Engineer. Perhaps you could post another link that discusses the wiring of reversing loops. I have in mind to construct another layout described as an East-West running track with reversing loops at each end <br /> <br />I understand from reading the material in your last link that the reversing loops need to be electrically isolated from the main track at both the entrance to and exit from the loop. I suspect that while the train is at the precise point of change from the main line to the loop or from the loop to the main, the polarity of the DC current fed to the motor is reversed. Is that correct? If so, what method is employed to determine which route (along the straight vs. curved leg of the turnout) the train is traveling on when entering or exiting the loop? <br /> <br />Thanks for you help! <br /> <br />Jerry M1 <br />
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