TM No. 377 



100 



50-- 



■Ojj^. STEADY FLOW 



5-' 



RATIO 



05-}^ 



RATIOS OF VIRTUAL SPEEDS U /w 

 AS A FUNCTION OF TOWING SPEED 



AT VARIOUS ANGLES W 

 WHERE a u ■9O-0 W 



K « K ■ 



TAN 80* © w »80 # 



STEADY FLOW 

 7 - H^ST^PY.FU^ __■_.__.;.. ....; ;...;; TAN43«0 W .45« 



TAN 60* W »6O # 



STEADY FLOW 



K ) 



TAN 20* 9^-20* 



K-*^ 



STEADY FLOW 



* * * • * • » TAN IO»flL- I0 # 

 ........ £--*- «w 



20 40 60 80 100 120 140 160 180 200 

 SPEED cm sec-' 



L%^ 



220 



Velocity Ratios at Various Tow Speeds and Angles of 9 



w 



Figure 11-25 



