Giddings and Wermter 





zo 



10 



— O WITHOUT TANK 



.-^— w«TH FLARED TANK 

 ...^... VVITH DUCTED TANK 



1.0 



1.2 



1.4 



Figure 6 



In Fig. 6, solid lines show the pitching magnification factor when the tank 

 was blocked. Broken lines show the results with a flared tank and with simple 

 holes. 



Chain lines show the results with a flared tank and with ducted openings. 

 About a 20 percent reduction at the maximum was attained with a ducted tank. 



808 



