A Vortex Theory for the Maneuvering Ship 





B - '^B' 



i^n(r') cos (— 7 'j dr' 



is positive and decreasing with a limit equal to zero. Hence 



'IB 



1 - f 



IB \ U 



is increasing. Therefore, the apparent efficiency of the planes must increase 

 with .'L V (see Fig. 9a). 



A^ 



^ 



r^ 



^^s ^ 



>' 



^"'S h 



t' 



r,g c 



Figure 9 



(HL 



u 



U 



893 



