G Equals G for shear modulus 



h Distance from axis of rotation to effective center of 

 mass of hydrofoil, positive when center of mass is 

 displaced from axis toward the approaching stream, as 

 in Figure 3 



h Distance from axis of rotation to center of mass of 

 rigid body, positive toward approaching stream, as in 

 Figure 5 



I Area moment of inertia of beam section about axis 

 perpendicular to the plane of bending; effective 

 moment of inertia of foil about axis through its 

 center of mass and parallel to axis of rotation (used 

 for foil not attached to beam) 



I Effective moment of inertia of foil as Just defined 

 when foil is attached to a beam; similar moment of a 

 rigid body 



2 

 I Equals I + h m for foil attached to a beajn 

 o ^ 



i /T 



K Numerical factor dependent upon geometry of beam cross 

 section; K <^ 1 



KAG Shear rigidity 



'1' ^2 



k is also the reduced frequency — 



L A constant in the lift formula assumed equal to ^-b- e; 



distance from effective center of mass of foil to lift 

 line 



I Length of beam 



l„ Length of hydrofoil 



M Total moment acting on cross section of beam material 

 lying toward x = 0, taken positive in same direction 

 as G or 9 



M Moment due to bending of beam 



