12
May 2016 / Bellmarine-AC / EN
5 INSTALLATION
5.1
GENERAL CONSIDERATIONS FOR A
SILENT OUTBOARD SYSTEEM
Before installing the propeller shaft system, the following
three points must be considered to make the (electric)
drive real quiet. The points are listed in order of
importance.
Inflow of the water from the propeller.
For example, a propeller with a 2.4 KW drive moves
about 280 liter water per second. The water inflow
should be disrupted at a minimum and the water
should flow horizontally through the propeller. If the
boat has a keel from which the propeller protrudes,
then the keel must be narrowed above and below the
propeller shaft to get the inflow to the propeller as
smooth as possible. . The view of the keel shows the
difference between a straight keel and a keel that is
narrowed.
There must be enough space (at least 15% of the
propeller diameter) between the propeller and the hull.
The same applies when a heel is mounted that
supports the rudder. When designing the heel, it is
important that the inflow of water is not disrupted. A
curved piece of flat steel can cause tremendous
turbulence in the water causing noise and loss of
efficiency.
There must be sufficient space between the propeller
and the rudder. It is an advantage that the rudder is
drop shaped en is not made out of a flat plate. This
drop shaped design is also called a NACA profile.
5.2
COMPONENTS
See the block diagram in chapter 3 and the wiring diagram
in section 5.8
During mounting of a Bellmarine e-propulsion system
serve the precautionary and safety instructions in Chapter
2 must be observed!!
CAUTION!
The complete installation has been fully
tested and configured for delivery, this
means that should always be the correct
motor and controller of this set to be
combined and to be installed as such.
5.3
MOTOR
A Bell Marine electric sailing system is extremely quiet and
virtually vibration-free if properly installed. This results in
pure driving pleasure!
Will therefore pay special attention to the proper
placement
and
installation
of
your
engine.
Figure 5-2: mounting of the engine
The motor must be mounted directly onto an existing
foundation. The motor must be fixed by using eight bolts,
as shown in Figure5-3.
.
During installation of the motor, pay attention to the
following
Check that all bolts are tightened after positioning the
motor and propeller shaft system.
Make sure that the motor is well protected and
prepared for unforeseen circumstances like leakage.
Suggestion:
place a automatic bilge pump!
Refer to chapter 8 for the motor dimensions.
