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MICHELL 



Figure 1 - Comparison of Michell Resistance with Measured Wave- 

 Pattern Resistance (Tsutsumi) 



area by which the wave resistance is made minimum under appropriate side 

 conditions. One very interesting fact is that the curve of the sectional 

 area, which is determined by the thin ship theory in such a way that the 

 wave resistance becomes minimum at Froude number 0.25 with the condition 

 of prismatic coefficient being 0.60, is nearly identical with the curve of 

 sectional area of the corresponding Taylor Standard Series (Figure 2). It 

 is recognized that the latter form shows excellent characteristics at 

 medium Froude numbers, and this fact is enough to testify the great genius 

 and intuition of the late Admiral Taylor. 



For the purpose of quantitative prediction of wave resistance, on the 

 other hand, Michell' s theory is far from useful. Two reasons are con- 

 sidered for the discrepancy of the theory from measured results; one is the 

 effect of viscosity and the other is the effect of finite breadth of the 

 ship. The effect of viscosity upon wave resistance has been studied by 

 several authors, but no reliable theory has been developed yet. As to the 

 effect of finite breadth, on the other hand, several attempts are known 



