It was decided to calculate the wave resistance experienced by the model and the 

 wave profiles along the hull and to compare these theoretical values with the results of ex- 

 periments. 



Auxiliary resistance integrals, which simplify the work considerably, were not avail- 

 able at the time. Since, however, the drafHength' ratio H/L is not covered by the systematic 

 computations now being made at the Taylor Model Basin, an independent evaluation was need- 

 ed in any case and justified the appreciable work involved. 



RESISTANCE 



The original form of Michell's resistance integral may be reduced to the dimensionless 

 form 2 



r 



p _Spg B'H 



ft) 



\r 2 (r) + r z (y)\ , K M 



r 1 r 1 6n _ 2 ■&-£( • 

 Z*(y) =J J J^re L V coaytdtdt [2] 



J * { y ] = n ft e ' 2 ^ V^sinr^d^C [3] 



Jo <>0 5 



where $ = -f- 



y=r x 



2v 2 2F 2 

 77 = waterline equation of hull 



1,-y[u(»)+'fH)] 



T 'a= ^[n(x)-n(-x)] 



■q , rj represent the symmetrical and antisymmetrical parts of the hull with respect 

 to the midship section, and 



v = speed of advance. 



Since for a symmetrical hull I*(y) = 0, Equation [1 ] reduces in this case to 



