20,000 



18,000 



16,000 



14,000 



12,000 



<^ 10,000 



6000 



4000 



2000 



























/ 







REFERE 



^0 1 / 



5 



20* / 

 1 17 









\D X CD 

 INCES 4 ANC 



/ .18 



























15' 



!'» . 

 16* 



/l3 













/ 















'2. / 

 II / 













XlO 















/T'^ 











0.02 



0.04 06 0.08 0.10 



MINIMUM SHELL THICKNESS 



0.12 



0.14 



MIDPLANE DIAMETER 



Figure la - Based on Minimum Measured WaJ.l Thickness 



10 



