16
020571.03
vetus®
Installation recommendations for thrusters
Polyester thrust tunnel:
Resin:
The resin used for the polyester thrust tunnel is Isophtalic
polyester resin (Norpol Pl 2857).
Pre-treatment:
The outside of the tunnel must be roughened. Re-
move all of the top surface down to the glass-fibre. Use a grinding
disc for this.
Important: Treat the end of the tunnel, after it has been sawn to
length, treat the end of the tube with resin. This will prevent water
seeping in.
Laminating:
Apply a coat of resin as the first coat. Lay on a glass-
fibre mat and impregnate with resin. Repeat this procedure until
you have built up a sufficient number of layers.
A polyester thrust tunnel should be finished
as follows:
• Roughen the hardened resin/glass-fibre.
Apply a top coat of resin.
• Treat the side of the tunnel which comes
into contact with water with ‘epoxy paint’
or 2-component polyurethane paint.
• Then apply anti-fouling treatment if re-
quired.
5
Installation of the thrust tunnel
Drill 2 holes into the ship’s hull, where the
centreline of the thrust tunnel will be, in ac-
cordance with the diameter of the marking
tool.
Pass the marking tool (home-made) through both pre-drilled holes and set out the outside
diameter of the thrust-tunnel to the hull.
Thruster
‘
BOW . . . . .’
D [mm] (inches)
Steel
GRP
Aluminium
25 . . .
121
(4
49
/
64
”)
120
(4
13
/
32
”)
120
(4
13
/
32
”)
45 . . .
134
(5
9
/
32
”)
136
(5
23
/
64
”)
—
35 . . .
55 . . .
159
(6
17
/
64
”)
161
(6
11
/
32
”)
160
(6
19
/
64
”)
60 . . .
75 . . .
95 . . .
194
(7
41
/
64
”)
196
(7
23
/
32
”)
196
(7
23
/
32
”)
125 . . . 160 . . .
267
(10
33
/
64
”)
265
(10
7
/
16
”)
264
(10
25
/
64
”)
220 . . . 230 . . . 285 . . . 310 . . .
320
(12
19
/
32
”)
320
(12
19
/
32
”)
320
(12
19
/
32
”)
410 . . . 550 . . .
420
(16
17
/
32
”)
424
(16
11
/
16
”)
—
Install the thrust-tunnel.
Dependent on the vessel’s construction ma-
terial, cut out the holes by means of a jigsaw
or an oxy-acetylene cutter.
