Spacerails Level 3 - Advanced Track Construction: Loops and Splitters; Space Loop Diameter Requirements

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2nd loop size is smaller: The second loop must be
smaller than the rst loop to keep the Marble running.
It is 70 mm in diameter. Measure with a ruler.
Building the space loop: For the loop to work, the
diameter of the rst, larger, loop has to be 1/2 the height
of the fall. The rst loop should be 80 mm in diameter.
Loop shape: Make sure your loops are a nice even
circle and are fully upright. Use Rail Clips to help
maintain shape.
Close up of nished space loops: Note the vertical
alignment, shape, and the two dierent loop sizes.
Also note the placement of Rail Clips.
Close up of nished space loops: Note the vertical
alignment, shape, and the two dierent loop sizes.
Also note the placement of Rail Clips.
Rails entering Rail Splitter: Trim the rails at 90° and
make sure they are not longer than shown in the image.
Height = X
Loop Diameter
= 1/2X
160 mm
80 mm
70 mm
80 mm