134 M. P. Tulin 
2.0 
a 
2/, x Flap Effectiveness, 2/a Ci /e 
° 
(0) 0.2 0.4 0.6 0.8 1.0 
Flap-Chord Ratio, f/, 
Fig. 10. Free surface effect on two-dimensional 
supercavitating flap effectiveness 
-10 
) 
M 
Yo? v2 c2 
Hinge Moment Coefficient, Cy' x 10° 
( Cyr = 
fo) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 
Foil Lift Coefficient, C, (6,€) 
Fig. 11. Supercavitating hinge moment coefficient 
