Davis and English 



02 0-4 



14 16 



0-2 0-4 



Fig. 16 - Comparison of efficiencies between bronze and 

 epoxy resin models — screw T95 



Table 3 



Screw T95 (Leading Edge Thickness -1/2% Chord), 



Height of Cavity Above Back of Blade Surface, 



Measurement Position: 70% Radius, 20% Chord from Leading Edge 



0.30 



0.40 



0.5 



0.6 



0.8 



Greater than 2-1/2% chord - 



0.95 



Nearly 2-1/2% chord 



1.05 



About 1-1/2% chord 



Less than 1-1/2% 

 Greater than 1/2% 



Results uncertain 

 due to striations 

 from leading edge 



1.10 



-Not fully cavitating— all pins visible 



982 



