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REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



I. REPORT NUMBER 



DTNSRDC 77-0087 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and SubHlte) 



A METHOD FOR PREDICTING THRUST DEDUCTION USING 

 PROPELLER LIFTING SURFACE THEORY 



5. TYPE OF REPORT & PERIOD COVERED 



Research and Development 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfsJ 



B.D. Cox and A.G. Hansen 



B. CONTRACT OR GRANT NUMBERf»; 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



David W. Taylor Naval Ship Research 

 and Development Center 

 Bethesda, Maryland 20084 



(See reverse side) 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Sea Systems Command 

 Washington, D.C. 20362 



12. REPORT DATE 



November 1977 



13. NUMBER OF PAGES 



14. MONITORING AGENCY NAME & ADDRESSfyr df//ersnt Irom ConlrolUng Olllce) 



15. SECURITY CLASS, (oi thla rapoTt) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol this Report) 



APPROVED FOR PUBLIC RELEASE: DISTRIBUTION UNLIMITED 



17. DISTRIBUTION STATEMENT (al the abatraci anterad In Block SO, II dlllarent Irom Raport) 



IB. SUPPLEMENTARY NOTES 



KEY WORDS (Continue on r, 



Propeller 

 Thrust Deduction 

 Lifting Surface 



laceaaaty and Identity by block number) 



Propeller-Hull Interaction 

 Potential Flow 



20. ABSTRACT (Continue on reverae aide II necaaaary and Identity by block number) 



An analytical method is presented for predicting the added resistance 

 (thrust deduction) arising from propeller-hull interaction. The theory is 

 formulated in terms of the potential flow about the hull and appendages 

 which are represented by surface singularity distributions. The influence 

 of the propeller is derived from lifting-surface theory including the effects 

 of blade number, thickness, skew, rake, and radial and chordwise load dis- 

 tribution. In order to determine the interaction force, propeller-induced 



(Continued on reverse side) 



DD 



1473 



EDITION OF 1 NOV 65 IS OBSOLETE 



S/N 0102-LF-014-6601 



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