29 / 60
Complete delivery
• Complete from factory with no assembly
at the yard, suitable for L-drive with
flange-mounted motor.
• Tunnel length and shape tailored to
the hull shape. No additional welding
of tunnel extensions at yard.
• Outer tunnel complete with ring
and axial stiffeners located to meet
hull frames, tank top and
longitudinal hull structure.
Resilient mounts/
isolators
• Located with no exposure to oil,
sunlight or high temperatures.
• May be withdrawn for
inspection from inside the tunnel
even with the ship afloat –
without affecting the hull integrity.
• Anticipated lifetime
more than 25 years.
Tunnel seals
• Double seals located in a
protected position.
May be inspected visually and
have additional drain valve for
checking cavity between seals.
• The design implies that there
is no requirement for a
water-tight thruster compartment.
• Anticipated lifetime more than
25 years.
Acoustic elements
between tunnels
• Designed to ensure that properties
are maintained under variable
environmental conditions.
• Can be accessed via cover plates
in inner tunnel conical inlets.
... featuring ...
• Inner tunnel delivered complete with
conical inlets.
• Grids delivered pre-installed
on request.
• Delivered with cathodic protection and
paint treatment, including anti-fouling
except for the outer surface of
the outer tunnel.
Engineering support
• Brunvoll offers expert assistance in
noise assessment.
• Engineering support for hull integra-
tion.
Easy
inspection
and
maintenance:
Built as a
complete
module for
easy installation
for yards:
Full-length resilient
mounting is
paramount for
maximum noise
suppression
29