













At = 7° F 

















































































































































h 



(FEET) 

 250 



240 



■ 230 

































: 





*> 



<• 



r gencej_ 























- 220 



210 

 200 

 190 

 180 



- 



/ 



t 









oiV 





















/ 



/ 

 1 











€s 



















170 

 160 

 150 

 140 

 130 



/ 



: / 

 / 





.*- 



h 

























: / 

 : 1 



/ 

 / 



* 









•^^ 



















120 

 1 10 

 100 

 90 

 80 



- 1 

 : 1 



/ 

 1 



1 ,, 





h^dWerj 



ence) ^ 























- 1 



! / 

 / / 



/ 











^0^ 



^pV^-^' 















70 

 60 



- 1 / 

 : 1 I 



/ 1 

 I 1 , 

 1 / 





























40 

 30 



- I/' 































20 

 10 



- '/ '/ 

 : 1 1/ 



\ / 





























FIGURE 17 PARAMETERS v AND h VERSUS k FOR STABILITY INDEX At = 6° TO 8° F 



35 



