Installation Of The Thrust Tunnel - Vetus BOW2512D Instructions De Montage

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'
2512
4512
5512
3512
5524
6012 7512 9512
6024 7524 9524
12512
16024
12524
22024 28548
Dependent on the vessel's construction ma-
terial, cut out the holes by means of a jigsaw
or an oxy-acetylene cutter.
Install the thrust-tunnel.
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.
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.
16
020571.03
D [mm] (inches)
Steel GRP
121 120
(4 49 / ") (4 13 / ")
64 32
134 136
(5 9 / ") (5 23 / ")
32 64
159 161
(6 17 / ") (6 11 / ")
64 32
194 196
(7 41 / ") (7 23 / ")
64 32
267 265
(10 33 / ") (10 7 / ")
64 16
318 320
(12 33 / ") (12 19 / ")
64 32
Aluminium
120
(4 13 / ")
32
160
(6 19 / ")
64
196
(7 23 / ")
32
264
(10 25 / ")
64
320
(12 19 / ")
32
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.
vetus® Installation recommendations for thrusters