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Section 7 - AIRFRAME AND SYSTEMS DESCRIPTION
AVIONIC SYSTEM
P-Mentor – Aircraft Flight Manual Page 7 - 33
9.1.5. GTP 59 (TEMPERATURE PROBE)
The Garmin GTP 59 is an outside mounted temperature probe that provides raw
air temperature data.
One GTP are installed, interfaced with the GSU 25, and provide them with
temperature data in order to allow the evaluation of temperature influenced air
data parameters.
9.1.6. GSU25
(ADAHRS)
GSU25D ADAHRS (Air Data Computer plus Attitude and Heading Reference
System) unit is remote device that provide the aircraft with AIR DATA, attitude
and heading reference system.
The GSU25D is the LRU responsible for sensing and converting in a suitable
format air data, attitude, and heading information and is connected to
Engine/Airframe sensors in order to receive their information. The GSU 25D
interfaces also to a remote mounted GMU magnetometer responsible of sensing
of heading information and furthermore computes OAT and TAS exploiting data
provided by the GTP 59 outside temperature probe. It is divided into two modules
(AHRS and ADC).
GSU 25D provides the following information:
- Aircraft Altitude and Airspeed
- Aircraft Vertical Speed, Mach, and Air Temperature
- Density Altitude
- Pressure Altitude
- Indicated Airspeed
- True Airspeed
- Aircraft heading, pitch and roll
- Aircraft yaw, pitch and roll rates
- Aircraft body-axis accelerations
- Rates of change of heading, pitch and roll
- Aircraft accelerations expressed in a local level frame of reference
The air data computer static port is connected to the primary static ports. The
GSU 25 also provides the operating current to the GTP 59 OAT Probe.
9.1.1. GMU
11 (MAGNETOMETER)
GMU 11 unit is a microprocessor based magnetometer. It is used to sense Earth
magnetic field alignment and provide this data to compatible ADAHRS processors
for use in Referencing aircraft magnetic heading.
GMU 11 provides magnetic information to support GSU25D functions. The
following list shows the GSU 25D Interfaces used to connect the GMU 11:
- Magnetic field strength and direction
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