Counter Flange’s Installation - Quick BTR250 User Manual

INSTALLATION
EN
Counter flange's installation
Directly access inside the hull, where the thruster will be installed.
F
The thruster position must enable easy maintenance operations.
Fig. 1
COUNTER FLANGE
• In the two positions (X) of the long sides of the counter flange, the height must be 130/140 mm less the hull's thickness (SP) (Fig. 1).
Adapt the shape of the central part of the counter flange (Y) to the hull's curve.
• Shape the short sides of the counter flange like the hull's curve, in the position where it's meant to be fixed (fig. 1B).
• Lay the properly-cut counter flange and check that the four sides fit the hull, or adjust them until they do fit in the position where
the counter flange is meant to be fixed.
Fig. 2
• Mark with a felt-tip pen the internal
perimeter of the counter flange (fig. 2).
Fig. 5
24
HULL
(X = 130/140 mm - SP)
Fig. 3
420
• Remove the counter flange and mark the
cutting area: 480 x 420 mm (fig. 3).
480 100
mm mm
mm
• Align the counter flange to the hull's opening and check that
the two heights (X) are correct. Resinate the counter flange, or
solder it in case of aluminium or steel, according to the tech-
niques the most suitable to the hull's material (fig. 5).
• Make a solid coaming for the closing lid on the whole perimeter
of the hull's opening (fig. 6).
Fig. 6
Fig. 1B
CUT LINE
Fig. 4
• Cut the hull along the cutting area pre-
viously marked (fig. 4).
COUNTER FLANGE
HULL
LID
RETRACTABLE THRUSTER BTR250 - IT EN - REV08B