Propeller -Induced Appendage Forces 



1.4 t 



1.2 



1.0 



,6 - 



.4 - 



,2 - 



■V 



1.0 



1.2 



1.4 



Fig. 39 - Propeller thrust coefficient as a function 

 of advance ratio 



appendage chord, 2? = 14 ft, 



appendage thickness ratio, s/2l = 0.15, 



appendage span = propeller diameter = 16 ft. 



Since the theory developed herein is two-dimensional, the total force on the 

 appendage is therefore proportional to the total span, and the present set of com- 

 putations are appropriate to the conditions described above. The parameters 

 that will be varied in the numerical computations are the number of blades n, 

 the propeller advance ratio J, the propeller thickness ratio to/2Cp, and the sep- 

 aration distance between the propeller and the appendage, represented by the pa- 

 rameter fJ defined in Eq. (1). 



215 



