Model of a Double-Threaded Archimedean Screw Propeller. The corridors go twice and are divided into segments painted blue and white, from which a normal two-blade screw can be constructed. The screw can be turned by hand on the screw shaft. The pitch is approx. 11 cm, the diameter 8 cm. 1:20 scale (derived)., P.N. Rijk (attributed to), Netherlands, 1844, wood (plant material), brass (alloy), h 14.5 cm × w 30.8 cm × d 11.5 cm
Keywords:
Model, Double-Threaded Archimedean Screw Propeller, corridors go twice, divided, segments painted blue, white, normal two-blade screw, constructed, screw, turned, hand, screw shaft, pitch, approx, 11 cm, diameter 8 cm, 1, 20 scale, derived, P.N, Rijk, attributed, Netherlands, 1844, wood, plant material, brass, alloy
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