Vislink ARTR, Manual

Page: 9 / 38

Issue No: C Page: 5
Ref: ARTR-ASUM-7001 Copyright © 2017 IMT Ltd, trading as Vislink
The Antenna Retractor Unit (ARTU) is an electromechanical device attached typically to the skid of
a helicopter, and is designed specifically to lower and retract a microwave antenna. Various
microwave antennae maybe attached to the ARTU. The antenna is stowed in the horizontal
position on the inside of the skid of the helicopter and is lowered to a vertical position below the
skid for operational use when the helicopter is airborne.
The ARTU was designed in accordance with British Civil Airworthiness Requirements (BCAR) to
operate at speeds up to 120knots with 100mm diameter and 200mm long antenna lowered.
NOTE: The maximum operating speed of the ARTU is dependent on the type of microwave
antenna fitted. The maximum operating speed of the ARTU must be confirmed with the
manufacturer if a larger antenna is intended to be used (See appropriate DCIS).
The ARTU has been fitted to the following aircraft/helicopters:

AS 350

AS 355
The antenna retractor unit is strapped to the helicopter’s skid by means of stainless steel, band
clamps secured by means of locking nuts. Refer to Figure 2-1. The retractor unit weighs 5.5kgs
(12.1lbs) excluding the weight of the microwave antenna, looms and remote control.