Liehman and Kaplan 



3.00r 



0.20 



0.10 — 



0.08 



X 0.06 • 



0.04 ■ 



0.02 ■ 



0.01 



Basic Thickness Blades 

 Double Thickness Blades 



0.25 0.50 



Spacing/Propeller Di2uneter 



0.75 



Fig. 13 - Blade -thickness effects on axial measurements at 

 various propeller harmonics with a four-bladed propeller 

 and a synrametrical appendage 



184 



