Thanks again. I concur with the definitions of the “Blade face” and “Blade back” But I’m still struggling with the “Thrust face” against the “Pressure face”
While “Geometric pitch” is defined as the theoretical distance that a propeller should move forward in one revolution without slip under conditions of 0° angle of attack, “Experimental pitch” is the theoretical distance that a propeller should move forward in one revolution without slip under conditions of zero lift.