For measuring how fast you go per hour with the course of a wind. Here you need a clock that will show the hours, points, and minutes.
Leonardo drew this anemometer for measuring
the strength of the wind, with an anemoscope
positioned on top of it to indicate wind direction.
The model is constituted of a wooden supporting
structure upon which a graduated sector of
a circle is positioned. A thin copper strip hangs
hinged on the upper support. Above the structure, a cylindrical extension houses an anemoscope rotating on a pivot, constituted of a pennant with ball head and fletched tail.
In accordance with the wind speed, the copper
strip rotates within the graduated sector of the
circle. The anemoscope turns to indicate the
The model is based on the drawing:
- Codex Atlanticus f. 675 r. (1487)
Milano, Biblioteca Ambrosiana