Chapter 5 – General Operation
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4. Plug the Strobex into the tracking cable and the tracking
cable into the serial port on the connector subpanel.
5. Plug the dc connector from the Strobex cable into the
appropriate dc power required for the Strobex used.
6. Place the Strobex control in the Slave mode - “A”.
NOTE: This step is not necessary with the Model 135M-12
Strobex.
7. Operate the aircraft at the desired RPM.
8. Power up the Vibrex unit and press the TRACK &
BALANCE context key.
9. Press the STROBEX TRACK context key. The Strobex
Track screen displays (see the illustration in Section 5.5.
Main Rotor Track).
10. Enter the number of tail rotor blades, using the alpha-
numeric keypad.
11. View the track from the root of the tail boom while looking
at the edge of the tail rotor disc (with the aircraft running).
Deviations from left to right indicate out-of-track in the
obvious sense.
12. Synchronize the flash of the Strobex with the photocell
timing pulse so the blade tip targets become superimposed.
13. Judge the correct track by how far away from the tail boom
the targets appear or by how far from left to right the targets
appear, relative to each other.
5.6 Helicopter Balance (EV2K+ Heli
Only)
All helicopters can be balanced using the paper (polar) chart
methods described in Sections 5.5.2 “Main Rotor Balance –
Paper Charts (All units)”, 5.5.3 “Using the Rotor Protractor” and
5.5.4 “Tail Rotor Balance – Using Protractor”. The Enhanced
Vibrex 2000 Plus provides a Helicopter Balancing function using
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