COBHAM SAILOR Fleet One Installationshandbuch Seite 20

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Seitenansicht 19
Chapter 2: Installation
98-141368-A 12
Antenna mast length
The below table shows the values for a SAILOR Fleet One
antenna mast without stays or wires. Note that these values
are only guidelines - always consider the environment and
characteristics of the ship before deciding on the mast
dimensions.
The mast mount kit interfaces to a 1½” tube (OD 48.3 mm -
absolute maximum OD 52 mm). Masts with larger diameters
must be tapered and the upper part of the tube (approximately
50 mm) must have a diameter of 1½”.
Note
Stays and rigid masts can still not prevent vertical vibration if the mast is attached to a
deck plate that is not rigid. Make every effort to mount the mast on a surface that is
well supported by ribs. If this is not possible, provide extra deck plate propping.
OD
(mm)
Wall
Thickness
(mm)
Weight
(kg/m)
Inertia
(X10
6
mm
4
)
Max. free
mast length
(steel), m
48.3 3.25 3.61 0.117
< 0.6
48.3 4.05 4.43 0.139
50 3.00 3.48 0.123
60.3 3.65 5.10 0.262
<0.8
60.3 4.50 6.17 0.309
76.1 3.65 6.80 0.547
< 1.0
76.1 4.50 7.90 0.651
88.9 4.05 8.47 0.974
< 1.1
88.9 4.85 10.10 1.140
Free mast length (m)
OD (mm)
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