. Shipbuilding and Shipping Record. , thenP = -009365 SD^V. Accordingly curves of E, or efficiency, and cf S, completelycharacterise a given model propeller. Fig. 8 is taken from Taylorspaper and shows the method of presentation adopted. ExjAanaiion of curves.—It was found from experience, that forpurposes of design it would be highly advantageous to plot afreshTaylors results on a base of pitch ratios for certain definite discarea ratios. Accordingly the curves now presented were constructedfor -3,-4,-5, and -6 disc area ratios. (Figs. 9, 10, 11, 12.) Severalimportant points may be observed f
. Shipbuilding and Shipping Record. , thenP = -009365 SD^V. Accordingly curves of E, or efficiency, and cf S, completelycharacterise a given model propeller. Fig. 8 is taken from Taylorspaper and shows the method of presentation adopted. ExjAanaiion of curves.—It was found from experience, that forpurposes of design it would be highly advantageous to plot afreshTaylors results on a base of pitch ratios for certain definite discarea ratios. Accordingly the curves now presented were constructedfor -3,-4,-5, and -6 disc area ratios. (Figs. 9, 10, 11, 12.) Severalimportant points may be observed from an inspection of these.(1) With decrease in pitch ratio the power absorbed rapidly increasesat a certain definite slip. (2) Decrease in efficiency accompaniesdecrease in pitch ratio, the maximum efficiency being given by 224 SHIPBUILDING AND SHIPPING RECORD. September 6, 1917. TiGURE 9 Figure tl TAYLORS 1904 EXPERIMENTS with 3 BLADED PROPELLERS?3 DISC AREA RATIO CORVES OF S. (power ABSORBTION coefficient) and EliEFFICIENCr). PITCH RATIOS Figure ID TAYLORS 1904 EXPERIMENTS with 3 BLADED PROP£LLERS •4 DISC AREA RATIOCURVES OF S, (power ABSORBTION coefficient) and E.(efficiency) A^I-6
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondon, bookyear191
