Besoh and Liu 



i.o 



0.2 



-0.2 



■0.1* 



■0.6 



Flutter 

 Experiment Speed 



• Ref. 2 18.1 Knots(-2°) 



16.6 Knots(-*»°)- 



Theory 



— o— Two-Dim. 5.8 Knots 



Figure 16a. Damping ratio f 



10 15 . 20 



Speed in Knots 

 Figure 16b. Frequency 



25 



30 



Figure 16. Hydrostatic mode characteristics for strut of 



Reference 2 with pod and foils (Two-dimensional loading 

 calculation) 



3 84 



