Propeller Owner's Manual
136
INTRODUCTION
61-00-36
Page 1-12
Rev. 2 Feb/17
7.
Definitions
A basic understanding of the following terms will assist in
maintaining and operating Hartzell Propeller Inc. propeller
systems.
Term
Definition
Annealed
. . . . . . . . . . .
Softening of material due to
overexposure to heat.
Beta Range . . . . . . . . . .
Blade angles between low pitch and
maximum reverse blade angle.
Beta Operation . . . . . . .
Manual blade angle control in the
beta range to select positive blade
angles for positive thrust, negative
blade angles for negative thrust, and
zero blade angle for no thrust.
Beta System . . . . . . . . .
Parts and/or equipment related
to operation (manual control) of
propeller blade angle between low
pitch blade angle and full reverse
blade angle.
Blade Angle
. . . . . . . . .
Measurement of blade airfoil
location described as the angle
between the blade airfoil and the
surface described by propeller
rotation.
Brinelling
. . . . . . . . . . . .
A depression caused by failure of
the material in compression.
Chord . . . . . . . . . . . . . .
A straight line between the leading
and trailing edges of an airfoil.
Cold Rolling
. . . . . . . . .
Compressive rolling process for the
retention area of single shoulder
blades which provides improved
strength and resistance to fatigue.
Constant Force
. . . . . . .
A force which is always present in
some degree when the propeller is
operating.
