Malavard 



X. 4 



Cl . 0,4 



Cl/C, 



d/s , 0,4 



Fig. 19 - Design of a super cavitating wing with strut and walls effect, 

 (a) configuration of the testing channel, (b) length of the strut is equal 

 to that of the central chord, and (c) width of the strut is 70% of that of 

 the central chord. 



where the integral is applied to the slit representing the wake of the wing with 

 strut. Because the leading edge of the wing is supposed sharp, the suction drag 

 is here zero. This equation, as applied to the wing only, represents the resist- 

 ance due to the pressure being exerted on the lower surface. We can thus as- 

 sume that the resistance of a section of the lower surface is equal to the con- 

 tribution of the preceding integral, at points corresponding to this section in the 

 Trefftz plan; i.e.. 



I'm 



dx = - 



Bn 



394 



