Hartzell HC-82XF-1 Owner's Manual page 42

Term
Underspeed . . . . . . . . . The condition in which the actual
Variable Force . . . . . . . A force that may be applied or
Vertical Balance . . . . . . Balance between the leading
Windmilling . . . . . . . . . . The rotation of an aircraft propeller
INTRODUCTION
Propeller Owner's Manual
175
Definition
engine (propeller) RPM is lower
than the RPM selected by the pilot
through the propeller control lever
removed during propeller operation
and trailing edges of a two-blade
propeller with the blades positioned
vertically
caused by air flowing through it
while the engine is not producing
power
61-00-75
Page 1-12
Rev. 1 Jun/11