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Understanding how the G1000 avionics system in your aircraft works

American Air Flight Training. 2022. Cessna 172S (G1000 Glass Panel) - American Air Flight Training.We all love the convenience of the G1000 System and all of its integrated functions. This fancy avionics package is usually the initial eye-catcher for many student pilots. It's not until your CFI or DPE asks you, "how does it work?" that we start to see the complexities involved in this system. Here are the basics as to how your G1000 System works.Attitude Heading and Referencing System (AHRS) Your AHRS provides you with pitch, roll, and yaw information. Unlike a traditional six-pack of instruments that takes "raw data" from the pitot-static system and converts it into measurements, the AHRS system uses a Micro-electromagnetic system (MEMS) to calculate information. There are sensors called inertia sensors that measure: - Angular rate (measured by 3 MEMS gyros) Not like a typical Gyro, but uses angular rate and takes advantage of the Coriolis force by sensitive electric circuitry that detects the displacement of the gyro at small changes. Photo credit to ATPL Student— How Does AHRS Work?- Linear acceleration (measured by 3 accelerometers) These devices sense linear acceleration and measure the linear change between capacitors. Photo credit to ATPL Student— How Does AHRS Work?- Flux (measured by 3 magnetometers) This provides heading indications by sensing the earth's magnetic field. This device is used to function as a magnetic compass. It uses those flux valves or flux gates which is an electronic means of sensing magnetic lines of force. It is connected to the AHRS system via a cable. Photo credit to ATPL Student— How Does AHRS Work?Air Data Computer (ADC) Along with the AHRS system, it is integrated or works together with the air data computer to provide information to the pilot. The ADC in particular provides information regarding Airspeed, altimeter, vertical speed, true airspeed, static air temperature, etc. It can provide all of this information by taking raw data from the Pitot tube/ mass, static source, and temperature probe. Depending upon the specific G1000 system you have, you either have steam standby instruments (analog) or an aspen standby (digital/electronic sensors). There are many more aspects to the G1000 avionics system, so always refer to your G1000 manual for operational use.In my opinion, G1000 systems are one of my favorite systems to use due to their user-friendly application and installed safety margins.
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