INDU Airspeed — Manual
2. Installation & Maintenance
2
Installation & Maintenance
The Indu airspeed requires a standard size 57 or 80 mm hole in the instrument panel. The
position of the hole must ensure that the instrument is always visible from the pilot’s per-
spective.
2.1
Mounting Dimensions
The mounting screw holes are located on a circle of 66.5/89 mm diameter. The instrument
is mounted using four screws type M4. To prevent internal stresses, please make sure that
the instrument panel is flat. It is highly recommended that the instrument panel is mounted
using rubber shocks, which reduce the vibrations. Figure 5 illustrates the mounting hole for
both sizes of instrument.
(a)
57 mm
(b)
80 mm
Figure 5:
Instrument panel cutout and mounting hole. Note: Figure is not in scale.
2.2
Connections
Figure 6 illustrates all connections at the back side of the instrument.
2.2.1
Static Pressure -
Pst
The instrument must be connected to the static pressure source. Static pressure source is
usually obtained from pressure sources located on the fuselage side surfaces or from the static
port on the pitot tube.
Locate the existing tube, cut it at an appropriate place and insert a T junction. Install a
new tube from junction to the instrument.
It is highly recommended to keep the static tubing as short as possible. The tubing must
avoid sharp bends and twists. The tubing must be airtight. Water must not be allowed to
enter the tubing.
It is strongly recommended to label each tube before connecting to instrument. This will
help a lot if you ever have to remove and re-install the instrument.
8
©
Kanardia
2016
