Hartzell HC-E4 3 Series - Definitions

Propeller Owner’s Manual
147
INTRODUCTION
61-00-47
Page 1-18
Rev. 16 May/20
14. Denitions (Rev. 4)
A basic understanding of the following terms will assist in
maintaining and operating Hartzell Propeller Inc. propeller
systems.
Term Denition
Annealed Softening of material due to overexposure to
heat
AviationCertied Intended for FAA or international equivalent
typecerticatedaircraftapplications.ATC
and PC number must be stamped on the
hub, and a PC number must be stamped on
blades.
Aviation
Experimental
Intended for aircraft/propeller applications
notcertiedbytheFAAorinternational
equivalent. Products marked with an “X”
at or near the end of the model number or
partnumberarenotcertiedbytheFAAor
international equivalent and are not intended
touseoncerticatedaircraft.
Beta Operation A mode of pitch control that is directed
by the pilot rather than by the propeller
governor
Beta Range Blade angles between low pitch and
maximum reverse blade angle
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