17 



and the identical relationship between asymptotic cavity shape and body drag is obtained, 

 and (c) for finite cavities behind wedges the shape of the cavities according to the Linearized 

 and Riabouchinsky model theories are in good agreement. 



2. The use of the linearized theory obviates the necessity for choosing a finite cavity 

 model. The linearizing assumptions, themselves, permit a meaningful closed cavity solution 

 to be found. 



3. The use of the linearized theory reduces the problem of calculating cavity shapes and 

 drags for arbitrary slender bodies (and positive cavitation numbers) to one of quadratures. 



4. The shape of finite cavities behind slender bodies is, according to the linearized the- 

 ory always essentially elliptic, the slenderness of the ellipse being a function of the cavita- 

 tion number. 



