Johnsson and Stfntvedt 



Ampl 

 mm 



0.6 



0.5 



0.4 



0.3 



02 



0.1 



-° — First Ship"Thorshammer"5bl. without fins 

 -■ — Second Ship^Norse King" 6 bl.with fins 



65 

 I 



BALLAST 

 84 



^ 



— 



78o 



/ 

 / 



FULLY LOADED 



N}40 



Meas. point V2 V2 V4 VA V5 V5 V2 W V5 V1 V3 V6 V6 



Figure 4 Vibration levels in wing tank No 5, SB. For positions of 

 pickups, see Figure 1. Numbers indicate approximate 

 number of revs per min. 



622 



