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Chadwick-Helmuth Vibrex 2000 Plus User Manual

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Contents
vi Chadwick-Helmuth Company, Inc.
5.4.3 Obtaining Balance Solutions. . . . . . . . . . . . . . . . . . . . . . . 81
5.4.3.1 Application Guidelines . . . . . . . . . . . . . . . . . . . . . . 81
5.4.3.2 Using the Propeller Protractor. . . . . . . . . . . . . . . . . 82
5.4.3.3 Changing Performed Solutions . . . . . . . . . . . . . . . . 84
5.4.4 Finishing Propeller Balance . . . . . . . . . . . . . . . . . . . . . . . 84
5.4.4.1 If Unable To Use Weight Azimuth . . . . . . . . . . . . . 85
5.4.5 Reviewing Balance Histories . . . . . . . . . . . . . . . . . . . . . . 86
5.4.5.1 Reviewing Propeller Balance Measurements . . . . . 87
5.4.5.2 Reviewing Other Balance Measurements . . . . . . . . 88
5.4.5.3 Reviewing Spectrum Peak Measurements . . . . . . . 89
5.4.5.4 Reviewing Spectrum Order Analysis . . . . . . . . . . . 89
5.4.5.5 Clearing Runs, Measurements, and Lists . . . . . . . . 89
5.5 Helicopter Rotor Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
5.5.1 Main Rotor Track . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
5.5.2 Main Rotor Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
5.5.3 Using the Rotor Protractor . . . . . . . . . . . . . . . . . . . . . . . . 96
5.5.3.1 Counter-Clockwise Rotor Correction . . . . . . . . . . 100
5.5.3.2 Clockwise Rotor Correction . . . . . . . . . . . . . . . . . 104
5.5.4 Tail Rotor Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
5.5.4.1 Clockwise Rotors . . . . . . . . . . . . . . . . . . . . . . . . . 105
5.5.4.2 Counter-Clockwise Rotors . . . . . . . . . . . . . . . . . . 105
5.5.5 Tail Rotor Track . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
5.6 Spectrum Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
5.6.1 Spectrum Analysis Setup . . . . . . . . . . . . . . . . . . . . . . . . 109
5.6.1.1 Ranging Feature . . . . . . . . . . . . . . . . . . . . . . . . . . 111
5.6.1.2 Annotating Spectra . . . . . . . . . . . . . . . . . . . . . . . . 111
5.6.2 Collecting Spectral Data . . . . . . . . . . . . . . . . . . . . . . . . . 111
5.6.3 Order Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
5.6.4 Spectrum Viewer Feature . . . . . . . . . . . . . . . . . . . . . . . . 114
5.6.4.1 After Taking Measurements . . . . . . . . . . . . . . . . . 114
5.6.4.2 Displaying Cursor Data. . . . . . . . . . . . . . . . . . . . . 116
Chapter 6. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 117
6.1 Maintenance: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
6.2 Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
6.2.1 Digital Subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Table of Contents

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Chadwick-Helmuth Vibrex 2000 Plus Specifications

General IconGeneral
BrandChadwick-Helmuth
ModelVibrex 2000 Plus
CategoryMeasuring Instruments
LanguageEnglish

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