

\ 



















\ 



















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\ 



















n=2 \ 



















^ 























































\ n=3 





\ 















\ 





\ 















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\ 















\ 





\ 



^ 













\ 







\ 













\ 







\ 













\ 







\ 





















\ 











\ n = 4 









\ 











K" 1 





\ 









X^ 







V 





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\ 











\ 









s 



s. 





\^ 





N 



^ 









v 







^"■^-^ ^\ 





\v 









V 









i>-. 



^S. 









V 



'^^ 



^^^— 

















^"^ 



^V 



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-.^ 





















^^ 



~^___ 





















10 



Length -:. Radius ( L / R ) 

 b 



Figure 1 - Shell Pressure Factor (p ) as a Function of Bulkhead Spacing (L^//?) 



