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Questions tagged [avionics]

Avionics is applied electronics to aviation. Radars, radios, instruments, dashboards, they all belong to this category.

395 questions
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Why is the input power of an ADS-B Transponder much lower than its rated transmission output power?

ADS-B Transponders are usually rated with 150W or 250W transmission power, however the electrical input at 14V is rated much lower, usually around 6 Watt. How can that be? 150 W transmission power with an efficiency of 70% would result in > 200 W…
hans
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How does an aircraft derive winds aloft on its own?

The G1000 has a feature where it can put up a winds aloft arrow/speed in the PFD. I've been sort of wondering how exactly this is determined. My guess is that the aircraft (or the G1000) knows your airspeed via the pitot/static system and heading…
Aaron
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What is the difference between CAN and ARINC?

I want to know the difference between CAN and ARINC, I'm confused about their usage. For example, the communication between the cockpit and the controllers is done using ARINC protocols. And the data transmitted by probes to the controllers goes…
Stack Over
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13
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What do the gyroscopes used in commercial aircraft actually look like?

I pretty much grew up watching Air Crash Investigation and Seconds From Disaster and every other episode had a mention of the aircraft’s gyroscopes, but I always wondered how did FAA rated industrial long use gyroscopes actually look like and where…
Kxy
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What does "Mods" and then the check marked list of numbers mean on avionics?

Most of the avionics I see have a label that says "Mods" and then various numbers checked 1-15. Image source. What does this information relate to?
spence
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6
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Will the G1000 cut off transmission over 35 seconds?

I'm new on G1000 system, it says; If the push-to-talk (PTT) Key becomes stuck, the COM transmitter stops transmitting after 35 seconds of continuous operation. I'm wondering if we keep speaking on COM over 35 sec, will it stop transmitting? Or,…
Red Ananas
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G1000: Is it possible to balance the radio volume for pilots and passengers?

I regularly fly a DA42 4-seater equipped with a G1000 system. Sometimes my passengers in the rear seats complain that the radio volume is too loud for them but it is OK for me (intercom is just right for everybody). Reason probably is that I am…
Thomas Wana
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What are the differences between FADEC and EEC systems?

Can anyone differentiate FADEC and EEC system in an aircraft Engines? As I was working related to Engine controlling. I got confused of FADEC and EECs. As per some of the doc. I read like EECs are a part of FADEC.
Stanly
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Is MIL-STD-1553 still used in modern aircraft?

I am working on an assignment for my "Avionics Systems Design" class and I want to use MIL-STD-1553 for my aircraft system. But according to some shady blogs this STD has been deprecated or superseded by MIL-STD-1773. If I don't want to use an…
BigZee
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Which GPU (Graphics Processing Unit) is used to generate the graphics for avionics?

I guess it isn't the GTX 1080Ti. But which GPU(s) has the Boeing 737-NG for example? How does it differ from a GTX 1080Ti (cost: around €800), or Quadro P6000 (cost: around €7100)? How many GPU's are required? And what is the cost of one single…
Hugo Woesthuis
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3
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What does "DO" in "DO-160" stand for?

What does "DO" in "DO-160" stand for? Is it short for document? I have searched in internet but it only mentions the document details.
Dynamic_equilibrium
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Is it possible to display WAAS enabled GPS Flightlines on older mechanical flight directors such as S-tec?

We are in the research process of a panel upgrade in a M5 Maule. The ac is used for transportation and aerial survey to support ground survey. We frequently fly tight, low alt grids. Lateral and vertical deviation limits are 50’. Is it possible to…
Howard Helms
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What Electronic Flight Display is this?

I just watched this video in which the avionics surprised me. It looks like a half Garmin G600, attached on his yoke. What is that and is it permanently attached to the yoke or is it portable? Could it be for aircraft that can not be retrofitted?…
Noah Krasser
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Why would the digits fade out and blink in darkness on a KX-155?

I have a radio installation with two KX-155 Nav-Comms. These radios are equipped with a photocell to automatically dim the displays to match cabin lighting. In dark lighting, the digits fade to the point of unreadability, with some segments being…
2NinerRomeo
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Aircraft data bus and computer system

What is a line replaceable unit (LRU) in an aircraft data bus system? What kind of components are defined as LRU in a data bus system?
wmk
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