Lindgren, Johns son and Dyne 



Duct DA 



Duct D5 



Duct D6 



Duct D7 



Fig. 9 - The shapes of the four ducts testsd 



Table 4 



Comparision Between Computed and Measured Ducted Propeller 



Characteristics at the Design Point Kjj/J'^ = 1.64 



1280 



