476 



FIGURE 8. Measurements with oscillating 

 hydrofoil. Recorded signals. 



Max, angle of attack amax 



H 1 



t. f, 



'M 



.^ 



V /Vy A/pJ A>V Ay v^^/y 



Hydrophone signals 

 H2 , \ ) 





- — Synchronization flash 



''AV^>, 



End of film- 



FIGURE 9. Oscillating hydrofoil. Pressure signals and cavitation, a = 3° 5 = 4°. 



