Sailor 500 FleetBroadband, Installation Manual, Page: 31 / 154

Chapter 2: Installing the system
Placing the antenna 15
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2.2.4 Antenna mast design
Overview
The antenna mast must be designed to carry the weight of the antenna unit,
which is approximately
• 16 kg (+ the weight of the mast flange) for the SAILOR 500 FleetBroadband
antenna and
• 3.9 kg (+ 1.1 kg for the mast mount kit) for the SAILOR 250 FleetBroadband
antenna.
The mast must also be able to withstand onboard vibrations and wind forces
up to 108 knots on the radome, even in icing conditions.
The SAILOR 500 FleetBroadband and SAILOR 250 FleetBroadband antennas
use different methods for mast mounting. The following sections describe the
the two methods separately.
SAILOR
®
500 FleetBroadband antenna mast flange
The top of the SAILOR 500 FleetBroadband antenna mast should be fitted with
a flange with holes matching the bushes in the radome.
The flange thickness must be at least 10 mm. The antenna is to be mounted on
the flange by means of 4 M10 bolts. The length of the bolts must be such that
they engage into the bushes of the radome with minimum 6 mm and
maximum 12 mm.
Drill a hole in the centre of the flange for the antenna cable
and for drainage from the radome. For recommended dimensions of the
flange, see Outline dimensions, SAILOR 500 flange on page 94 in Appendix B.
Important
Avoid sharp edges where the flange is in direct contact with the
radome. Round all edges as much as possible to avoid
damaging the surface of the radome.