XsV5Z 
Moment coefficient, M Imm) 
X5,V5Z 
Torque coefficient, O/oneDe) 
Centrifugal blade spindle torque coefficient, My /(opn°D”) 
Ded & 
Thrust coefficient, T/(on D ) 
Moment components about x,y,z axes from loading on one 
blade 
nth harmonic amplitude of M 
Propeller revolutions per unit time 
Propeller blade section pitch 
Time average propeller torque arising from loading on all 
blades, ~2M,, 
Radius of propeller 
Reynolds number, Co 7VR*/Y 
Radial coordinate from propeller axis 
Radial center of hydrodynamic component of axial force, 
M/A CEs ay) 
Ya He 
Radial center of hydrodynamic component of transverse 
force, M /(F_ ) 
HOH 
Skew back of propeller blade section measured from the 
spindle axis to the midchord point of the blade section, 
positive towards trailing edge 
Time average thrust of propeller, positive foward, ZF 
Maximum thickness of propeller blade section 
Model speed 
Propeller speed of advance 
Vector sum of speed of advance and rotational velocity 
at the 0.7 sadius, Wie + (0.7mnD)2)1/2 
Radial component of wake velocity, positive towards hub 
nth harmonic amplitude of es 
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