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SPECIFICATIONS
Intake area: 3848 mm
Fan swept area (FSA): 3044 mm
Exhaust area (78% FSA): 2367 mm
Housing inner diameter: 70 mm / 2.76 in
Housing outer diameter: 76 mm / 2.99 in
Rotor diameter: 69 mm / 2.72 in
Max. motor diameter: 30.2 mm / 1.19 in
Weight (no motor): 72g / 2.54 oz
Max. motor power: 1.7 kW
Motor Recommended : 3200-3500KV B28
MOTOR : Not Included
Fan Adaptor : 3.17mm
The WM 400 Fan Housing is designed to be extremely rigid
and is manufactured using carbon and special formulated
ABS plastic compound.
To add to the fundamental strength of the housing, solid
rips are designed on the fan housing.
This helps to maintain the very light and strong structure
which is laid out to be highly resistant to vibrations
and resonance.
Precision moulding ensures smooth airflow and support
the truly awesome preformance.
Due to the very high possible operating power levels
of the MOTORS used in these fans (up to 1.7kW), it is
essential that the Main housing will not distort.
WM 400 fan are extremely high performance and designed
to withstand the high loads and G Forces of high performance
operation. The blades and the hub are tooled as a single
piece with special consideration to strengthening the
design of the blades. The rotor is tooled in a way to
allow special aluminium bush which is precision machined
to take the conical shaft adapter.
The conical shaft adapters are made from steel, for
ease of assembly and maintenance these adapters provide
an execellent reliable method of attaching the motor
shaft to the rotor. At these very high rotational speeds
it is most important that the motor shaft is truly concentric
and runs true with the hub attached. This is achieved
by a four slot split conical design to the adapter.
This attaches the adapter firmly and truly to the motor
shaft while the hub is likewise attached using the threaded
end of the shaft, using 6mm washer and nut. An adaptor
tha relays on two grub screws and CNC machined to fit
the hub direct is also available.
A final adjustment is available with the shaft and motor
assembly using an arrangement of 2.5mm grub screws in
the shaft adapter as a stop for the axle. For motors
that have cooling holes for airflow into the motor then
this can be optimised by setting anything up to a 2mm
gap between the rotor hub and stator/motor assembly.
A strong flow of air is achieved from the front of the
fan wheel through to the gap which is situated in the
low pressure area of the fan. Motors that are sealed
require a gap setting of 0.5mm. 30C Best)
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The Wm 400 fan is totally new and advanced
EDF which is designed using full size calculation and flow
prediction methods as well as taking account of much lower
Re-numbers which derive from the slower velocities and smaller
fan blades, in comparison to full size praxis. Wm 400 is a
high quality fan which has proven all the predictions. In
contrast to other EDFs it has got inlet guide vanes, which
is arranged in fron of the rotor. This layout is inherently
more efficient for small ducted fans than the usual found
make up with the outlet guide vanes behind the rotor. The
Wm 400 has the following design advantanges: 1. high efficiency
of better than 80% (usually 60-65% are the norm on other EDFs)
2. high power absorption capacity at lower rotational velocities
3. high pressure development, which allows to use small air
intakes and exit nozzles 4. high tolerance to inlet flow deficiencies
and long ducting.
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HERE FOR INSTALLATION MANUAL
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