Installation; Preparations For Installation - Multiplex True Airspeed Notice D'utilisation

2. Installation

The True Airspeed + Vario sensor is connected as
follows:
G
· Pitot pressure input (a)
The upper of the two tube connectors on the
sensor should be connected to the red silicone tube
attached to the Prandtl tube using the 25 mm length
of clear connecting tube.
· Static pressure input (b)
The lower of the two tube connectors on the sensor
should be connected to the clear silicone tube
attached to the Prandtl tube using the 25 mm length
of clear connecting tube.
· Prandtl tube (c)
The Prandtl tube is the sensing element for the
model's airspeed. The longer of the two ends should
be connected to the red silicone tube, the shorter to
the clear tube.
· The sensor lead (d)
should be plugged into the receiver socket marked
"MSB" or "Sensor".
· The sensor (e)
can be installed in any position in the model's fuse-
lage; attach its narrow side (f) to the bottom of the
fuselage. It is important that there is no flow of air
through the fuselage at the selected sensor position.
· The silicone tubes (red / clear)
are about 2500 mm long, and can be shortened or
extended to any length. To extend them you can
use the tube set (Order. No 85422). If you have to
shorten the tubes, ensure that the stainless steel
sleeves are pressed fully into the ends.
e)
a)
f)
b)
c)

Preparations for installation:

The Prandtl tube is supplied already connected to the
silicone tubes. Install and secure the Prandtl tube at
a sensible point in the model, as described on the
following page.
If necessary, shorten or extend the silicone tubes.
The silicone tubing must not be kinked (bent
sharply) when deployed, i.e. it is important that air
can flow unobstructed through the tubes.
When you have completed this step, connect the
silicone tubes to the sensor (e), and the sensor lead (d)
to the receiver.
The sensor is now ready for use.
Tip:
If you do not require a speed display, you can ignore
the Prandtl tube and the connecting tubes entirely, and
simply install the sensor (e) in the fuselage on its own.
d)
GB
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