Wake and thrust deduction were determined by test with models of a fishing trawler and a bulk carrier. The experiments were carried out at several different speeds, both ahead and astern, and with various revolutions. The following combinations were studied: (1) ship going ahead, propeller going ahead (V positive, n positive (1st quadrant)) (2) ship going astern, propeller going ahead (V negative, n positive (2nd quadrant)) (3) ship going ahead, propeller going astern (V positive, n negative (3rd quadrant)) (4) ship going astern, propeller going astern (V negative, n negative (4th quadrant)). The trawler model was tested with 2 different propellers. Propeller diagrams were prepared giving the thrust coefficient K sub t, the torque coefficient K sub q, and resistance plus tow rope pull coefficient K sub r as functions of the advance number J' for all these combinations. Furthermore, the wake coefficient w and the thrust deduction coefficient t have been shown as functions of the advance number. Finally, manoeuvre nomograms for the two models were also prepared. (Author)
Wake and Thrust Deduction at Extreme Propeller Loadings
1967
52 pages
Report
No indication
English
Wake and thrust deduction at extreme propeller loadings
Engineering Index Backfile | 1967
|Wake and Thrust Deduction at Extreme Propeller Loadings
NTIS | 1967
|Wake and thrust deduction at extreme propeller loadings
TIBKAT | 1967
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