The track then wraps around the plot a 2nd time, weaving back and forth, and completing a helix around the base of the 1st turnaround.

Thunderbird

Thunderbird

18 November, 2022 by Gazza

The track then wraps around the plot a 2nd time, weaving back and forth, and completing a helix around the base of the 1st turnaround.

In this photo