Page 



10 - Cavity Boundary Condition with 5-Degree Polynomial 



and without Hub Image of Model 4717 44 



11 - Cavity Boundary Condition with Hub Images and Cubic 



Polynomial Source of Model 4717 45 



12 - Boundary Condition on Cavity with 5-Degree Polynomial 



and Hub Images of Model 4717 46 



13 - Radial Component of Velocity with Cubic Polynomial 



Source of Model 4717 47 



14 - Radial Component of Velocity with 5-Degree Polynomial 



Source without Hub Image of Model 4717 48 



15 - Computed Pitch-Diameter Ratio of Model 4717 with 



Hub Image 49 



16 - Camber Correction Factor c of Model 4717 with Hub 



o 



Image, 6 = 2 Degrees and I = 2.5 50 



17 - Design Cavity Thickness t/(cC ) at Leading Edge 



x/c = 0.1 51 



18 - Pitch-Diameter Ratio of Model 3770 with Leading-Edge 



Point Drag (Case 1) 52 



19 - Pitch-Diameter Ratio of Model 3770 without Leading- 



Edge Point Drag (Case 2) 52 



20 - Pitch-Diameter Ratio of Model 3870 (Case 1) 53 



21 - Pitch-Diameter Ratio of Model 3870 (Case 2) 53 



22 - Lifting-Surface Source Correction Factors (Case 2) 54 



23 - Camber Correction Factor c of Model 3770 54 



o 



24 - Camber Correction Factor c of Model 3870 55 



o 



25 - Drawing of Propeller 4717C 56 



26 - Drawing of Propeller 4738A 57 



27 - Placement of Brass Pin Perpendicular to Back of Blade 58 



28 - Pin Locations at 10, 30, 60, and 90 Percent of 



Chord at Nondimensional Radii (r/R) Values of 



0.361, 0.544, and 0.726 for Propellers 4717C 



and 4738A 59 



