Glossary
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13841 Rev A
268
Harmonic A vibration relative to some primary
(fundamental) disturbance.
Hertz One Hertz (Hz) equals one cycle per
second.
IPS Inches per second; a unit of measure for
vibration velocity. In the context of the
Vibrex 2000 and Vibrex 2000 Plus, IPS
represents a velocity peak.
Mil A unit of physical measure; one mil equals
0.001 in.
Model For EV2K+ helicopter balance: a
helicopter model selected from a
predefined factory list. A model is specific
to a series and/or variant in this definition.
Move line A line connecting two balance points.
These two points may be two consecutive
balance readings with an adjustment in
between or two balance points on the
same run with a change in power setting
(for fixed-wing applications).
Phase A term used to describe angular measure
or time.
Phase lag The angular distance an object or
assembly moves before its movement is
measured.
Reflective The optical quality of a surface to deflect
light.
Regime A helicopter flight state or regime needed
collect specific measurements.
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