3.2
DETERMINING & MARKING UP POSITION
a)
Remove the counter-mould on the inside of the hull ,in area where thruster will be
installed, allowing at least 15 cm on the outside of mounting base position for stratifying
the mounting base to the hull.
b)
Position the thruster inside
the hull. Cut a piece of
wood( length = 121mm –
hull thickness) to use as a
spacer. Place this spacer
between the thruster’s
flange and hull. This will
give the installation height
and position of the unit.
c)
When satisfied with the
initial position of the unit,
take measurements at
various points between the
flange and the bottom of
the hull. Mark these
measurements onto the
mounting base to
determine the initial shape
to which the base should
be cut. To allow sufficient
tolerance, add 5 mm to all
the above measurements
to allow for tolerances.
d)
Mark-up the thrusters initial position on the inside of the hull before removing unit.
e)
The thruster unit can now be removed and once the mounting base has been cut, using the
above measurements, the base can be temporarily fixed in place in its marked position.
f)
Place the thruster unit in the temporarily fixed mounting base to verify dimensions.
g)
Once satisfied
clearly mark the
final position of
the inside of the
mounting base
STERN
267mm
BOW
and remove base.
Final Hull
29.5mm
Hull
h)
Measure and
mark the hull
opening using the
dimensions noted
on the diagram
opposite. Also see
“Build Drawing”.
195mm
Opening
Inside
29.5mm
Mounting Base
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