Model of a Double-Threaded Archimedean Screw Propeller, P.N. Rijk (attributed to), D. van den Bosch (attributed to), 1844 Canvas Print

Model of a Double-Threaded Archimedean Screw Propeller, P.N. Rijk (attributed to), D. van den Bosch (attributed to), 1844 Canvas Print

Polychrome instructional model of a two-course Archimedean screw in a frame on a baseboard. The corridors go around twice and are divided into blue and white painted segments, from which an ordinary two-bladed screw can be constructed. The screw can be turned by hand on the propeller shaft. The pitch is approx. 11 cm, the diameter 8 cm. Scale 1:20 (derived).

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