Hartzell HC-B3-2 Series Owner's Manual And Logbook page 52

Term
Edge Alignment
Erosion
Exposure
Face
Face Alignment
Feathering
Fraying
Fretting
Galling
Gouge
Propeller Owner's Manual
Distance from the blade centerline to the
leading edge of the blade
Gradual wearing away or deterioration
due to action of the elements
Leaving material open to action of the
elements
The surface of the blade that is directed
toward the rear of the aircraft. The face
side is the high pressure, or thrusting,
side of the blade. The blade airfoil
sections are normally cambered or
curved such that the face side of the
blade may be flat or even concave in the
midblade and tip region.
Distance from the blade centerline
to the highest point on the face side
perpendicular to the chord line
The capability of blades to be rotated
parallel to the relative wind, thus
reducing aerodynamic drag
A raveling or shredding of material
Damage that develops when relative
motion of small displacement takes
place between contacting parts, wearing
away the surface
To fret or wear away by friction
Surface area where material has been
removed
INTRODUCTION
139
Definition
61-00-39
Rev. 17 Apr/20
Page 1-22