Lehman and Kaplan 



4.0 

 3.0 



2.0 



-p 

 w 



3 

 U 



£: 



Eh 



^ 1.0 

 0) 



"2 0.8 



a 



o 



o! 0.6 

 \ 



o 



£ 0.4 



t3 

 (U 



^ 0.3 



■o 



c 



H 



X 0.2 

 o 



.-H 



0.1 h 



{ 



38. 



<ii-. 



Open Symbols = 1st Harmonic 

 Solid Symbols = 2nd Harmonic 



■tA 



0.2 0.4 0.6 0.8 



Spacing/Propeller Diauneter 



1.0 



Fig. 30 - Induced force ratio vs spacing ratio for a 

 three -bladed propeller downstream of an appendage, 

 axial measurements, and an appendage angle of -10° 



200 



