Going Spare Posted February 4, 2023 Share Posted February 4, 2023 @TopcatUnfortunately, using that R-number system is by no means foolproof because numerous track sections embossed with R6xx numbers were produced with both steel and nickel silver rail. Only those with R4xx are definitely steel and R8xxx are definitely nickel silver. Link to comment Share on other sites More sharing options...
LTSR_NSE Posted February 4, 2023 Share Posted February 4, 2023 @topcat regarding 3rd rail - I wasn’t suggesting that current doesn’t flow through the wheels or running tracks at all, of course it does! However since these rails are not insulated/isolated from ground, (and the third rail is) it is equally apparent which is the source of the current and which the return.The point I was making was simply that using a dedicated collector and all wheels merely for return (or not at all in case of 4th rail) is demonstrably more reliable than using half wheels to collect & half to return.I agree that labels such as positive/negative can indeed be used differently and lead to confusion, hence my preference for layman language - source & return. Link to comment Share on other sites More sharing options...
Topcat1707821625 Posted February 5, 2023 Share Posted February 5, 2023 @GSI stand corrected. A bit careless of Hornby to use the same numbers for steel and nickel silver track. In that case if you buy online then you need to get confirmation from the seller what type of track it is. Link to comment Share on other sites More sharing options...
Topcat1707821625 Posted February 5, 2023 Share Posted February 5, 2023 @LT&SR_NSEMaybe I'm being a bit pedantic. Probably because I'm looking at it from the point of an electronic engineer rather than a railway electrical engineer. Link to comment Share on other sites More sharing options...
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