Hartzell HC-E4 3 Series Owner's Manual page 53

Term
Trailing Edge
Trimline
Underspeed
Unidirectional
Material
Variable Force
Vertical Balance
Voids
Windmilling
Woven Fabric
Wrinkle (aluminum
blade)
Wrinkle (composite
blade)
Propeller Owner's Manual
The aft edge of an airfoil over which the air
passes last
Factory terminology referring to where the
part was trimmed to length
The condition in which the actual engine
(propeller) RPM is lower than the RPM
selected by the pilot through the propeller
control/condition lever
A composite material in which the fibers are
substantially oriented in the same direction
A force that may be applied or removed
during propeller operation
Balance between the leading and trailing
edges of a two-blade propeller with the
blades positioned vertically
Air or gas that has been trapped and cured
into a laminate
The rotation of an aircraft propeller caused
by air flowing through it while the engine is
not producing power
A material constructed by interlacing fiber to
form a fabric pattern
A wavy appearance caused by high and low
material displacement
Overlap or fold within the material
INTRODUCTION
147
Definition
61-00-47
Rev. 16 May/20
Page 1-27