Dynamics of Hydrofoils as Applied to Naval Propellers 



Rough approximations and the inadequacy of the Ludwieg-Ginzel 

 method of correcting flow curvature (based only on the induced velocity at 

 one point half way along the chord) account for the differences encountered. 



(c) The preceding deductions and in general the reliability of the pro- 

 cedure followed are supported by the reverse calculation, even though the 

 experimental results contain unavoidable inaccuracies of measurement and 

 the reverse calculation was used only in connection with nonoptimum free- 

 running propellers. 



REFERENCES 



1. Castagneto, E., Maioli, P.G., Servello, A., and Spinelli, F.S., "La Conser- 

 vazione Delle Eliche Navali," La Tecnica Italiana, March 1968 



2. Johnsson, C.A., "Comparison of Propeller Design Techniques," Fourth Sym- 

 posium on Naval Hydrodynamics, Aug. 1962, Washington, D.C. 



3. Silvestro, A., "Considerazioni sui Profili Alari NASA per Determinare 

 Alcune Formule di uso Pratico," Note di Ingegneria Navale, Fasc. LXII° del 

 Ministero Difesa Marina 



4. Van Manen, J.D., "Fundamentals of Ship Resistance and Propulsion," Publi- 

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5. Saunders, H.E., "Hydrodynamics in Ship Design," Part II SNAME, 1957 



6. Eckhardt, M.K., and Morgan, W.B., "A Propeller Design Method," Trans. 

 SNAME, 63, 1955 



7. Morgan, W.B., and Milam, A.B., "Section Moduli and Incipient Cavitation 

 Diagrams for a Number of NACA Sections," D.T.M.B. Report 1177, October 

 1957 



8. Pien, P.C., "The Calculation of Marine Propellers Based on Lifting-Surface 

 Theory," J. Ship Res., Sept. 1961 



9. Cheng, H.M., "Hydrodynamic Aspect of Propeller Design Based on Lifting 

 Surface Theory-Uniform Chordwise Distribution," Part I, D.T.M.B. Report 

 1802, Sept. 1964 



10. Cheng, H.M., "Hydrodynamic Aspect of Propeller Design Based on Lifting- 

 Surface Theory -Arbitrary Chordwise Load Distribution," Part II, D.T.M.B. 

 Report 1803, June 1965 



11, Murray, M.T., "Propeller Design and Analysis by Lifting-Surface Theory," 

 Intern. Ship. Progr. 160 



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