Propeller Owner’s Manual
139
INTRODUCTION
61-00-39
Page 1-26
Rev. 17 Apr/20
Term
Definition
Reference Blade Radius Refers to the propeller reference blade
radius in an assembled propeller,
e.g., 30-inch radius. A measurement
from the propeller hub centerline to a
point on a blade, used for blade angle
measurement in an assembled propeller.
A yellow adhesive stripe (blade angle
reference tape CM160) is usually
located at the reference blade radius
location.
Note: Do not confuse
reference blade
radius
with
blade station
; they
may not originate at the same
point.
Reversing
The capability of rotating blades to a
position to generate reverse thrust to
slow the aircraft or back up
Scratch
Same as “Nick”
Short Circuit
Connection of low resistance between
points on a circuit between which the
resistance is normally much greater
Shot Peening
Process where steel shot is impinged on
a surface to create compressive surface
stress, that provides improved strength
and resistance to fatigue
Single Acting
Hydraulically actuated propeller that
utilizes a single oil supply for pitch
control
Split
Delamination of blade extending to the
blade surface, normally found near the
trailing edge or tip
Station Line
See "Blade Station"
