The sign conventions for both right-hand and left-hand propellers are 
shown in Figure 1. In all pertinent figures and tables throughout this 
report the blade loading components are listed in the following order: 
1. Components measured by Flexure 1: 
a. Ee - axial force, or thrust per blade. 
b. Me - bending moment about the axis normal to the shaft axis 
at r=0. This moment is generated primarily by the B component of 
force. 
2. Components measured by Flexure 2: 
a. By - tangential force, or force normal to the propeller axis 
and the spindle axis. 
b. M — moment about the propeller axis, (r=0), or torque per 
blade. This moment is generated primarily by the By component of 
force. 
3. Components measured by Flexure 3: 
a. Ee - radial force, or force parallel to the blade spindle 
axis. 
b. M, - moment about the spindle axis, or spindle torque. 
4. Supplemental components which were derived from the components 
listed above (not derived for all conditions). 
ae My 3 = Fe Gn -0.3R) cos 0.3 + By (x 
— bending moment applied on the spindle axis about the axis inter- 
Fy -0.3R) sin $5.3 
secting the spindle axis at r=0.3R and parallel to the expanded 
pitch line at r=0.3R. The My 3 vector as defined by the convention- 
al right-hand rule for a right-hand propeller (left-hand rule for 
left-hand propeller) intersects the plane normal to the propeller 
axis at the angle bo ane tan (P, 3/0-3 mD) and is directed so that 
a positive M 3 puts the face (pressure side) of the blade in 
0 
tension. 
be Ei SOSA EED -0.4R) cos do.4 4p a ee -0.4R) sin 5.4 
— bending moment applied on the spindle axis about the axis inter- 
ONE 
secting the spindle axis at r=0.4R and parallel to the expanded 
pitch line at r=0.4R. The M vector as defined by the conven- 
0.4 
tional right-hand rule for a right-hand propeller (left-hand rule 
24 
