The variation of all measured loading components with blade angular 
position for the self propulsion condition (Condition 1 in Table 3) is 
shown in Figures 14 and 15 for the hydrodynamic loads, and is shown in 
Figure 16 for the total (hydrodynamic, centrifugal and gravitational) 
loads. The amplitudes and phases of the harmonics of these loading compo- 
nents are presented in Figure 17 for the hydrodynamic loads and in Figure 
18 for the total loads. Appendix B presents tabulated values of all the 
data in Figures 14 through 18, and Table 7 presents a summary showing the 
maximum value, minimum value and first harmonic of each loading component. 
The values for each loading component are presented as decimal fractions 
of the time-average value of the corresponding loading component. These 
time-average values for both hydrodynamic loads and total loads are pre- 
sented in Table 8. 
These data show that for hydrodynamic loading the variation of all 
loading components was predominantly a once-per-revolution variation. The 
extreme values for all loading components, except F, and My» occurred near 
the angular position of the spingle, axis, 0=124 ek degrees; i.e., 34 
degrees beyond the horizontal. At these positions the blade tip is 
approximately 12 degrees beyond the horizontal. This suggests that the 
tangential component of the wake is the primary driving force; see Figure 
10. The extreme values of Fy and M, occur at up to 120 degrees after the 
extreme values of the other components. The reason for this variation in 
location of extreme values is not clear; however, it may be partially due 
to experimental inaccuracy with the FO-M, flexure as discussed in the 
section on calibration. 
For total loading, the variation of all components with blade 
angular position follows basically the same pattern as for hydrodynamic 
loading. This occurs because the unsteady loading due to gravity, which 
is a pure first harmonic of blade angular position, is much smaller than 
that due to hydrodynamic force. Further for all components with a mea- 
surable gravitational load, except Fo» the maximum value occurs near the 
angular position at which the spindle axis is horizontal; i.e., the 
gravitational load is nearly in phase or 180 degrees out of phase with 
the hydrodynamic load. 
B2 
