190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 5-1
5 GAP 26 (PITOT/AOA PROBE) INSTALLATION
This section contains information for the GAP 26 Pitot/AOA (Angle of Attack) probe. Use this section to
install the GAP 26.
5.1 Equipment Description
The GAP 26 Pitot/AOA (Angle of Attack) probe is an air data probe intended for use in non FAA certified
aircraft, including light sport and home-built aircraft. This air data probe is intended to be used as part of
the G3X™ avionics system.
The function of the GAP 26 is to provide pitot and AOA pressures to the GSU 25 for the purpose of
displaying airspeed and AOA to the pilot as part of the G3X system. The GAP 26 does not provide a static
pressure source to the GSU 25. There are three different versions of the GAP 26, the -00 (unheated), the
-10 (heated, for ice protection), and the -20 (heated, with ice protection and regulated temperature limit).
All versions of the GAP 26 have identical aerodynamic performance including identical internal water
separation/baffling chambers, drain holes, pressure port locations and pneumatic tubing. The -20 version
of the GAP 26 includes a heater control box, that is mounted separately from the probe (
Section 5.5.3).
5.1.1 Moisture Protections
Both pitot and AOA pressure chambers have internal baffling and dedicated drain holes to provide
moisture protection.
5.1.2 Ice Protection
The heated version of the GAP 26 (010-01074-10) has dual internal electro-thermal heating elements to
provide ice protection to the areas of the probe where surface impingement of icing elements is expected to
occur. In addition to the same level of ice protection (as the -10 probe), the heated/regulated version of the
GAP 26 (010-01074-20) limits the maximum tip temperature to make the probe safer if powered on the
ground and to provide a discrete output that indicates when the heater is powered and providing sufficient
heat.
NOTE
The pneumatic tubing for pitot pressure is the longer of the two tubes extending out of the
probe (Figure 5-1).
Figure 5-1 GAP 26 Unit View (-10 version shown)
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