Hartzell HC-E4 3 Series Owner's Manual page 48

Term
Depression
Distortion
Edge Alignment
Erosion
Exposure
Face
Face Alignment
Feathering
Fraying
Fretting
Galling
Propeller Owner's Manual
Surface area where the material has been
compressed but not removed
Alteration of the original shape or size of a
component
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
INTRODUCTION
147
Definition
61-00-47
Rev. 16 May/20
Page 1-22