Paidoussis 



(a) 



(b) 



Fig. 8 Photographs in consecutive frames showing a cylinder 



11. 1 in, long and 0.54 in. diameter with streamlined nose 

 and tail executing (a) criss-crossing, essentially rigid- 

 body, oscillation (8 frames/sec), and (b) second-mode 

 flexural oscillation (24 frames/sec) 



Quantitative agreement in the various instability thresholds 

 and stable zones, based on estimated Vcdues of some of the theoreti- 

 cal parameters , was also fairly good. 



5.3 Results Based on the New Theory 



Typical results based on the new theory and obtained by using 

 Eqs. (10) - (13) are shown in Figs. 10 to 13. 



996 



