Lehman and Kaplan 



3.00 



2.00 



1.00 

 0.80 



0.60 



■p 



5 0.40 



I 0.20 

 o 



o 

 u 

 o 



^ 0.10 



■a 



o 



u 0.08 



3 

 ■O 



•-< 0.06 



0.04 



0.02 



0.01 



.•■ti 



First Harmonic Data 



Asymmetry: 1/4 Prop 

 Diameter 



Asymmetry: 1/2 Prop 

 Diameter 



Symmetrical Appendage 



Seco nd Harmonic Data 



1/2 Prop Diiuneter Data ^V^. 

 not shown ^^'^ 



Asymnetryt 1/4 Prop Di^uneter n^^^ 

 Symmetrical Appendage 



Asymmetry: 1/2 Prop Dieuaaeter 

 Asymmetry: 1/4 Prop Diameter 

 Symmetrical Appendage 



Third Harmonic Data 



0.25 0.50 



Spacing/Propeller Diameter 



0.75 



Fig. 15 - Appendage asymnaetry effects on axial forces for a 

 double -thickness, four-bladed propeller 



186 



