Hadler and He eke r 



10 K, 



10 K, 



O.it 0.5 0.6 0.7 0.8 0.9 1.0 .1.1 



SPEED COEFFICIENT J 



0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1-2 1-3 



SPEED COEFFICIENT J 



Fig. 18 - Transverse force coefficients of propeller 3768 60% submerged 



It is common practice to present the results of open-water propeller tests 

 in the K.J., Kq, j system of coefficients. This system has limitations when com- 

 parisons of the performance of the propeller at different submergence levels or 

 when comparisons with fully submerged operation are being attempted, either 



1468 



