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LE 
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REPORT DOCUMENTATION PAGE BEFORE COMPLETING FORM 
feiecoey Poe ee ae 
DINSRDC-81/054 
4. TITLE (and Subtitle) 5. TYPE OF REPORT & PERIOD COVERED 
PERIODIC SINGLE-BLADE LOADS ON PROPELLERS IN 
TANGENTIAL AND LONGITUDINAL WAKES 
Ship Performance Dept. 
Research and Development 
6. PERFORMING ORG. REPORT NUMBER 
8. CONTRACT OR GRANT NUMBER(s) 
. AUTHOR(s) 
Robert J. Boswell 
Stuart D. Jessup 
Ki-Han Kim 
10. PROGRAM ELE 
AREA & WORK 
NT, PROJECT, TASK 
IT NUMBERS 
. PERFORMING ORGANIZATION NAME AND ADDRESS 
David W. Taylor Naval Ship Research 
and Development Center 
Bethesda, Maryland 20084 
11. CONTROLLING OFFICE NAME AND ADDRESS 
Naval Sea Systems Command (05R) 
Ship Systems Research and Technology Group 
Washington, D.C. 20362 
14. MONITORING AGENCY NAME & ADDRESS(if different from Controlling Office) 
ME 
UN 
(See reverse side) 
12. REPORT DATE 
June 1981 
13. NUMBER OF PAGES 
88 
SECURITY CLASS. (of this report) 
15. 
Naval Sea Systems Command (524) 
Propulsion Line Shafting Equipment Division 
Washington, D.C. 20362 
UNCLASSIFIED 
1Sa. DECLASSIFICATION/ DOWNGRADING 
SCHEDULE 
. DISTRIBUTION STATEMENT (of this Repost) 
APPROVED FOR PUBLIC RELEASE: DISTRIBUTION UNLIMITED 
. DISTRIBUTION STATEMENT (of the abstract entered in Block 20, if different from Report) 
. SUPPLEMENTARY NOTES 
. KEY WORDS (Continue on reverse side if necessary and identify by block number) 
Marine Propeller Loads 
Propeller Research 
Propulsion 
Model Experiments 
. ABSTRACT (Continue on reverse side if necessary and identify by block number) 
Periodic single-blade loads were measured on model propellers in in- 
clined flow and in a single-cycle circumferentially non-uniform longitudinal 
velocity field. The experimental results were correlated with predictions 
by the following methods: 
1. A quasi-steady procedure developed by McCarthy at David W. Taylor 
Naval Ship Research and Development Center (DTNSRDC), 
(Continued on reverse side) 
DD ; FORM 1473 EDITION OF 1 NOV 65 1S OBSOLETE 
JAN 73 UNCLASSIFIED 
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