Cox 

 Linear distance between (x*, r*, 6*) and 



(x, r, + a^), i.e., [(x* - x)2 + r^ + 

 r*2 - 2rr* COS $] ^ ' ^ 



Radial cylindrical coordinate 



Surface consisting of cavity surface and propeller 

 blade surface 



1 /3p 

 S(r,i9) Pressure source strength, i.e., — ( r— 



277 \dn 



e Small increment 



e ( r ) Drag to lift ratio 



T] Propeller efficiency 



6 Angular cylindrical coordinate 



Advance ratio, i.e., — 



Induced advance ratio 

 Dummy variable 



946 



