turns per sail turn
| brake wheel | 1.00 |
| wallower | 3.00 |
| great spur | 3.00 |
| stone nut | 9.00 |
stones 9.00× the sails
| sails turned | 0.00 |
| stones turned | 0.00 |
Cutaway to see the gears. The red cog and the red rung meet
again every third turn — that is the 66:22 ratio, and the stones run nine
times the sails.