SF J
SF J
2020-07-28 whirligig flapping bird detail 3
3.5 : 1 pulley ratio, with thin knotted fishing-line coupling.
In 15 km/hr wind the wings beat about twice per second.
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Uploaded on July 28, 2020
Taken on July 28, 2020
2020-07-28 whirligig flapping bird detail 3
3.5 : 1 pulley ratio, with thin knotted fishing-line coupling.
In 15 km/hr wind the wings beat about twice per second.
235
views
0
faves
0
comments
Uploaded on July 28, 2020
Taken on July 28, 2020