Propeller Design 



14. High-Speed Propellers, G. Rosen (Hamilton Standard Division of 

 United Aircraft Corp., Windsor Locks, Connecticut). 



15. Design of Supercavitating Propellers on the Basis of Lifting- 

 Surface Theory, T. S. Luu (Centre du Calcul Analogique, Chatillon 

 sous Bagneux) and P. Sulmont (Ecole Nationale Superieure de 

 Mecanique, Nantes). 



16. A Propeller Design Method, A. Melodia (Cantieri Navali del Tir- 

 reno e Rinuiti, Genoa). 



17. A Method to Determine the Efficiencies of Propellers, E. A. 

 Schatte (Supramar, Lucerne). 



18. Discussions on Cavitation Erosion Resistance of Propeller and 

 Hydrofoil Structural Materials, J. Z. Lichtman (U.S. Naval Applied 

 Science Laboratory, Brooklyn, New York). 



In these proceedings only the introduction by Professor Van Manen has been 

 printed. For the contributions to the Panel Discussion, see "International Ship- 

 building Progress," March and April 1969. 



Introduction 



J. D. van Manen, Chairman 



Netherlands Ship Model Basin 



Wageningen, Netherlands 



A propeller design can be divided into two parts: 



1. the selection of propeller type; 



2. the determination of the main dimensions, such as diameter, rpm, and 

 number of blades. 



In solving these two questions special attention should be paid to the follow- 

 ing requirements: 



1. high efficiency or minimum required shaft horsepower; 



2. minimum danger of cavitation erosion; 



3. minimum propeller- excited vibratory forces; 



4. good stopping abilities; 



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