Hartzell HC-D2MV20-3 Series, Owner'S Manual And Logbook

Page: 38 / 204

Propeller Owner’s Manual
140
INTRODUCTION
61-00-40
Page 1-10
Rev. 2 Jun/12
Synchrophasing ............ A form of propeller sychronization
in which not only the RPM of the
engines (propellers) are held
constant, but also the position of the
propellers in relation to each other.
Track ............................. In an assembled propeller, a
measurement of the location of
the blade tip with respect to the
plane of rotation, used to verify face
alignment and to compare blade tip
location with respect to the locations
of the other blades in the assembly.
Underspeed .................. The condition in which the actual
engine (propeller) RPM is lower
than the RPM selected by the pilot
through the propeller control lever.
Vertical Balance ............ Balance between the leading
and trailing edges of a two-blade
propeller, with the blades positioned
vertically.
Variable Force .............. A force which may be applied or
removed during propeller operation.
Windmilling ................... The rotation of an aircraft propeller
caused by air flowing through it
while the engine is not producing
power.
6. Abbreviations
Abbreviation Term
AMM ............................. Aircraft Maintenance Manual
AN ................................. Air Force-Navy (or Army-Navy)
AOG .............................. Aircraft on Ground
FAA ............................... Federal Aviation Administration
Ft-Lb ............................. Foot-Pound
ID .................................. Inside Diameter
In-Lb ............................. Inch-Pound