1st radius curve 192 mm diameter arc 15 degrees 24 required for full circle The Hornby Arnold N scale track system is made up of 28 track components There are four radii curves from radius 1 192mm to radius 4 430mm The HN8012 4th radius curve can be used with all points & corssings to create parallel running lines The system has a number of technically advanced design features making it the professional track of choice Nickel Silver rail Wont rust nor oxidise Maintains electrical conductivity Chemically blackened Just like the wheels of most locomotive models today designed to make the track look realistic Dark Brown Sleepers Exactly like the real thing coloured to match real life Secure Connections The offset rails improve smooth running of rolling stock & reduced noise at each joint Long fishplates ensure good electrical connectivity Modern tooling & moulding ensures each connection fits perfectly no bending or jamming or sore fingers Rail Profile Dirt cant accumulate on the curved rail head making the track almost self cleaning Positive Powered Crossing Frog Even the smallest locomotives can run through our points without stalling thanks to continuous electrical supply to the entire frog Narrow 15 degree points Our points 3 way points & double slips all have 15 degree divergence meaning you can fit complicated track work into small spaces Plus it looks realistic Stop Switch function Power is only supplied to the chosen direction of travel through the point meaning no run away locomotives on the other track Left or Right handed Operate your points from either side with the Left or Right hand point motors Simple clip on Plus same motors work the double slip & Curved points Low profile point motors Slim line motors fit snugly to all points & ensure nothing protrudes to foul rolling stock Safety Cut out on point motors No matter how long or hard the button is pressed the operator cant burn out Arnold point motors as they automatically turn off after changing the point