a. Linear Theory 



90° 180° 270' 



360' 



'ZKI^ 



b. Stokes' Third-Order 



90° 180° 270' 



360° 



Figure 7. Comparison of linear and Stokes' third" order theories. 

 Simultaneous shift of lift force record as cj) increases 

 from 0° to 90° and k increases from to 1 with 

 increasing bottom clearance. 



34 



