WAVE RESISTANCE THEORY AND APPLICATION 
be calculated and tabulated in sufficient detail. 
The element proposed by Guilloton is a semi- 
infinite wedge; or, if we prefer, we may think of it 
as a certain semi-infinite source distribution. 
Guilloton has tabulated many of the necessary 
functions and has had noteworthy success in cal- 
culating wave profiles and so forth; and the ap- 
plication of the method to a survey of stream 
+0.6 
+0.5 
+0.4 
+0.3 
+0.2 
+0.| 
Scale of © Model N43 Less © Model 1846B 
I 
© 
0.35 
19 
lines around a fine hull promises results of great 
value, especially if it can be carried out for models 
for which experimental results are available. 
Another method, proposed for approximate cal- 
culation at high speeds, is to replace the continu- 
ous source distribution over the longitudinal ver- 
tical plane by a finite number of sources and sinks 
of suitable magnitudes and positions; it is ob- 
Differences Between Model N43 
and Model 18468 
—-— In ©we from Calculated Wave- 
Resistance Corrected for Effect 
of Viscosity on Wave-Making 
———In Ow from Calculated Wave- 
Resistance in a Perfect Fluid 
In © , from Experiment 
04 0.45 0.5 0.55 0.6 
Scale of Froudes Number=v/VgL 
Fic. 7 
569 
