Single-screw vessels equipped with Wagner or similar systems of guiding blades require considerably less power and fuel for given speed.
Contra-propellers effect saving by taking rotation out of ship's wake
Nautical Gaz
Nautical Gazette ; 103 , n 22
1922
1 Fig.
Aufsatz (Zeitschrift)
Englisch
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Nakashima's highly skewed propellers contributes to ship's fuel saving
Tema Archiv | 1984
Saving fuel with contra-rotating propellers
Online Contents | 1996
On the number of ship's propellers
Engineering Index Backfile | 1910
|Tema Archiv | 1988
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