Work of Prandtl and Betz on airfoil and airscrew theory encouraged Deutsche Werft to design number of marine screws in light of theory, and have them tested in Hamburg Tank; tests made to determine efficiency of new 3-bladed screw and normal 3-bladed screw showed improvement in favor of former of 7 per cent; however, behind ship, efficiency was reduced by half; similar work was carried out on 2-bladed screw intended to work with high-speed engine. See brief translated abstract in Mar. Engr. and Motorship Bldr., vol. 49, no. 592, Dec. 1926, p. 472.
Experiments on airfoil propellers
Versuche mit neuartigen, aus der Tragflugeltheorie abgeleiteten Propellern
Werft-Reederei-Hafen ; 7 , n 20
1926
3 pages
3 Figs.
Article (Journal)
German
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