Behavior of Unusual Ship Forms 



? 01 



° 02 



DFSTROYER 



note: 



plotted values of acceleration for 

 destroyer and semi-submerged ship 

 obtained by differentiation of reported 

 heave amplitudes lbs accelerations 

 are measured values 



ARGE-BULB SHIP 

 y/ ^^ — DESTROYER 



SEMI-SUBMERGED SHIP 

 2 OL X L/48 REGULAR WAVES 



SHIP SPEED, KNOTS 



T 



Fig. 25 - Comparison of heave (C.G.) accelerations in regular waves 



Finally, in Figs. 23 and 24, it is of interest to show the heave amplitude re- 

 lationship to the ship diameter for the Hydrofoil Semi-Submarine since it is of 

 importance that this ship traverse a limited corridor in the vertical plane. 

 These figures show that for either wave condition and for various wave heights 

 the ship rarely can be expected to traverse, above or below its equilibrium run- 

 ning depth, distances greater than 3% of the ship's diameter. 



743 



