Cube: F = 0.00424 e - 112 * v ; r 2 = 0.74 



SUPERDUCK: F = 0.4540 V - 25.026 ; r 2 = 0.76 



DUCK85: F = 4.047 10" 27 V 1A " ; r 2 - 0.95 



(19) 

 (20) 

 (21) 



103. Sand- trapping efficiencies for the DUCK85 and SUPERDUCK nozzles 

 were calculated by integrating each equation from 60 to 66 cm/sec, giving the 

 area beneath each equation (Figure 37). 



Cube: 



P66 



Acu = (0.004353 e Vmid 01123 ) dV 



0.004353 ( e < 66 > - 1123 - e (60)0 - 1123 ) 

 0.1123 



31.5 



SUPERDUCK: 



Aon — 



f66 



J (0 



4540 V mid - 25.03) dV 



0.4540 (66 2 - 25.03 (66)) 

 2.0 



- 0.4540 (60 2 - 25.03 (60)) 

 2.0 



21.4 



DUCK85: 



Anns — 



(3.055 10~ Z7 V, 



27 " mid "- 62 ) dV 



3.055 IP' 27 ( 66 1562 - 60 1562 ) 

 15.62 



4.00 



75 



