TM 55-4920-402-13&P
Section III. INSTALLATION
3-9. General. Detailed installation instructions for the
(2) Interrupter is installed on the rotating swash-
following VIBREX accessories are illustrated and explained
plate.
in applicable aircraft technical manuals. Checklists are also
(3) Reflective Targets are installed on the blade
provided with the VIBREX for each type aircraft. Figure
tips.
3-7 illustrates a typical VIBREX to airframe interface.
(4) Accelerometers are installed on the airframe to
a. Reflective Targets
sense main rotor-induced vibrations.
b. Brackets
b. Tail Rotor.
c. Interrupters
(1) Accelerometer is attached to or near the tail
d. Cables
rotor gear box to sense tail rotor-induced vi-
e. Accelerometers
brations.
f. Magnetic Pickups
3-10. Pre-operational Checklist. This procedure is to be
performed after preparation of the aircraft to verify that
the equipment is correctly installed and ready for test.
a. Main Rotor.
(1) Magnetic Pickup is installed on the fixed swash-
plate.
(2) Reflective, self-adhesive targets are applied to
one blade grip and to each blade tip.
c. Strobex Check
(1) Connect Strobex to Balancer.
(2) Apply +28 vdc to system.
(3) Set MODE switch on the Strobex to B, C, or
D.
(4) Pull trigger. Verify that Strobex begins firing
Change 4
3-8.1
