High-Speed Planing Hull for Rough Water 



(2) K= liij = r° ( 5 g 



- v g 



( Vr-) ( T =4°, /3 = 20°) 4 3 30> 



oLj a^^ ' 



(3) t _ equilibrium trim angle to achieve ( r? ) = 0.40 e for 



CG avg 



0= 20°, V K = 45 ; A = 150,000 lb. 



4K 



= 4K 



V 3 30 y 



Static Dis placement Considerations 



The block coefficient for planing hulls can vary between 0. 40 

 and 0.50. Having fixed a draft of 3.5 ft. for the present design, the 

 relations between length and beam will take on a more limited set of 

 values. than those previously developed from considerations of only 

 hull impact. 



C. 



B L B d 



where 



A = 150,000 lbs. 



L = length between perpendiculars, ft. 



= maximum draft, 3. 5 ft. 



= weight density of water, 64 lbs/ft 3 



d 



427 



