The Bladeless Propeller 



.75 



.50 



% 



■ 15 - STATIC OPERATION 



THEORY. WITH MIXING (REF, 9) 



THEORY, WITHOUT MIXING (REF. 8) 



O EXP'T. T2i"/T,j» « 1.0 (REF. 9) 



n EXP'T, TjjyT,," = 1.0 (REF 17) 



^U 



20* 



25« 



Fig. 12 - Static performance of a bladeless propeller 

 with and without constant-area mixing following the 

 deflection phase 



When the coning angle is large, Coriolos and centripetal accelerations can 

 no longer be neglected. These accelerations, first accounted for in the two- 

 dimensional analyses of Ref. 10 and 11, have a marked and favorable effect on 

 performance (Fig. 13). 



Coriolis effects are incorporated in the analysis of Ref. 12, where, in addi- 

 tion, (a) the deflection phase is treated by the strip method of Ref. 5, (b) consid- 

 eration is given to the effect of partial mixing during the deflection phase, and 



1363 



