Figure 1 (Continued) 



-PROJECTED OUTLINE 



7Z^ 



SWEPT OUTLINE- 



-EXPANDED OUTLINE 

 MIDCHORD LINE 



DIAMETER, D (m): 0.222 

 NUMBER OF BLADES, Z:4 

 ROTATION: OUTWARD TURNING 

 HUB-DIAMETER RATIO, D^/D: 0.312 



EXPANDED AREA RATIO: 0.775 

 PITCH-DIAMETER RATIO AT 0.7R: 1.111 



Figure lb - Schematic Drawing of Propellers 



BLADE ON WHICH ' ^ 

 FORCES ARE 

 MEASURED. cp M, 



F ,z 



BLADE ON WHICH 



PROPELLER 

 CENTERLINE 



FORCES ARE 

 ^.^^ MEASURED 



AHEAD (-I-V) AHEAD (+v) 

 X. F F , X 



THE COORDINATE SYSTEM 

 ROTATES WITH THE PROPELLER 



Figure 2 - Components of Blade Loading 



PROPELLER 

 CENTERLINE 



35 



