Trans RINA, Vol 156, Part B2, Intl J Small Craft Tech, Jul-Dec 2014


These presentations can be made for all models from the series. However, the families of curves also can be made by parameters , P/D and Ae /A0, so that two parameters do not change their values and the third one is changed from its initial value to the last. Because of that, the family of graphics has as many curves as the number of


times the parameter changes its value. Values of the mentioned parameters are in Tables 4 and 5. These families show how the dependence of KT on J and of KQ on J are changed when one parameter is changed. Since there are three parameters, there are three types of law as well (see Figures 6, 7 and 8).


for all values of 10KQ


KT


Figure 6: Model propeller with: Ae /A0=0.95, P/D=2.04


for all values of P/D


10KQ KT


Figure 7: Model propellers with: Ae/A0=0.95, =0.60


©2014: The Royal Institution of Naval Architects


B-51


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