Hydrofoils Running Near a Free Surface 149 
a 
ee 
2 
= 
= 
eS 
ers 
P : ait ae ; 
aeee 
ae 
oe 
eee 
cae 
_ 
ae 
aes 
Be 
eased ae 
Fig. 2. Pressure data for the flat foil of circle segment profile 
at subcritical and supercritical velocity 
