From Reference 46, C , '^ 1 .2 

 d ~ 



^D = S 



A V 



where C = drag coefficient 



p = mass density of seawater 

 w 2 



A = frontal area = 120 ft 



V = velocity = 1.69 ft/sec 



Then, 



Fp = (1.2)(1/2)(2 lb-sec^/ft^)(120 ft^)(1.69 ft/sec)^ 



F = 411 lb 



73 



