Here, the wind speed was not sufficiently high, so the milling stones were uncoupled. The main axle can be seen to idly turn. The assembly of the iron rod fastened to the curved wooden block forms the brake, which can be applied by the miller by tugging on a rope.
Interestingly, the main axle has teeth on both sides (although the non-engaged side seems to be missing several teeth). I assume that extra row of gear teeth was probably chosen to add optional functionality, but never really used. And over time, those teeth were perhaps used to replace the worn out ones from the engaged side that saw much action.
|camera||Canon EOS 7D Mark II|
|exposure mode||program mode|