70 



60 



50 



3 

 O 



I 



40 



i/ 





30 -- 



20 



10 ->- 



60 



50 



— "B' 



— 40 



/ 



2 



30 - 



> 



s 



— 20 



& 



S^t- 



EXAMPLE 



80 



A 



70 



60 



50 



-T 



40 -- 



30 -- 



10 



75' WATEPLINE LENGTH PT BOAT 

 MAX. V = 35 KNOTS = 40.3 MPH 



v xVT= 349 



MAXIMUM IMPACT PRESSURE 



P x = 36 psi 



20 -- 



10 



550 



500 



450 



400 



"C" 



_350^)_ 



300 



250 



200 



150 



100 



50 



■: £ 



Fig. 2-14. Maximum bottom pressure 

 for high speed planing boats 



2-16 



