F=1.77*Kr-5*(Vmid-28)~3.53 R2=0.98 

 Sand Flux (g/cm2/min) 



30 



(V-V*) (cm/s) 



40 



* Nozzle 



Power Threshold, F 



Figure 29. Flux measured with C nozzle 



Sand Flux (g/cm2/min) 



30 



(V-V*) (cm/s) 



50 



50 



SUPERDUCK 

 DUCK 85 



-I— CUBE -*- 5.0 min BASIN 



x HELLEY-SMITH SAMPLER 



Figure 30. Summary of power threshold fits 



62 



