404776/A
41
Streamlined housing mounted externally on a
steel hull
When a streamlined transducer is mounted under a steel hull, you must design, manufacture
and install a fairing.
A
Nut
B
Threaded rod with suitable diameter and length,
welded to the bottom of the fairing
C
Washer
D
Transducer cable
E
Hull
F
Fill with suitable filling compound (putty) to
reduce flow noise
The fairing must be made by
the shipyard, and it shall placed
between the transducer and the
hull. It is required to adapt for the
deadrise angle of the hull. It is also
used to house a cable service loop.
The fairing can be made of wood
or steel, and should have the
same outline dimensions as the
transducer body.
The height of the fairing must
allow the transducer face to reach
minimum 40 centimeters below
the hull.
Remember to create a small
opening on the side of the fairing to
allow trapped air to escape. Large
holes in the fairing will cause flow
noise, and must be avoided.
Once the transducer has been
installed, fill the bolt holes with a
filling compound (putty) to ensure
a smooth transducer surface.
Note
Any obstructions, cracks, dents
or unevenness on the transducer
face may cause flow noise.