Questions tagged [avionics]

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

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14
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2answers
1k views

How is an on ground lightning strike test conducted?

Whenever a design company is obtaining an STC for an aircraft (Supplemental Design Certificate) for an electrical installation, one of the required tests to obtain the STC is a lightning strike test. ...
14
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2answers
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How precise are altimeters?

How precise and how accurate are typical altimeters these days? That is, if two planes are flying (side-by-side, very near each other), and both altimeters show the same Flight Level, what is the ...
3
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1answer
148 views

What is the format specification for Avidyne R9 flight data?

The Avidyne R9 records flight data five times per second and can export it for later analysis. I'm interested in parsing this data and exporting it to Google Earth / X-Plane for visualization. ...
52
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4answers
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What programming languages are used for equipment onboard aircraft?

Generally speaking, What programming language is used in aviation for (ATC Radio, Radar, ILS, Auto-pilot and on-board avionics)? Is there a standard enforced by ICAO? Does every plane manufacturer ...
10
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1answer
687 views

Are there regulations or adverse effects regarding Bluetooth in the cockpit?

Are there any FAA regulations concerning wireless Bluetooth headsets in the cockpit of any aircraft? Moreover, I'm interested in finding out if the Bluetooth protocol (IEEE 802.15.1) will adversely ...
16
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2answers
3k views

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 ...
22
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5answers
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Could a Personal Locator Beacon or EPIRB carried by a passenger aid in locating a downed airliner?

There've been a lot of questions lately about tracking aircraft, and after a conversation with a friend of a friend I started wondering: Could a PLB or EPIRB carried by a passenger or crew member aid ...
23
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1answer
6k views

Do aircraft manufacturers produce their own black boxes?

Do the manufacturers who build airplanes use their own "black boxes" in the planes, or are there companies whose sole purpose is to develop black boxes? For example, in 2010 in the Airblue Flight 202 ...
20
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4answers
11k views

Like transponders, can flight recorders be turned off?

I never knew much about airplanes before the tragic incident of Malaysia 370. I have been spending a lot of time on Twitter reading various articles and investigations; in one of the articles I read, ...
7
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3answers
873 views

Is it possible to ping ACARS repeatedly and track an aircraft?

This is a followup to What data does ACARS send back to base? Can it be used to track a plane? I had asked this as a part of the earlier question, but it seems to be a large enough issue to be ...
32
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2answers
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How does an alpha (AoA) vane work?

The alpha vane (also called AoA vane) is an external probe used to measure the angle of attack. I have been trying to understand how exactly it works, but I can't find any clear explanation or ...
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3answers
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What data does ACARS send back to base? Can it be used to track a plane?

An aircraft's Aircraft Communications Addressing and Reporting System uses line of sight HF via ground stations or satellites to communicate with its base station. This system allows for three types ...
11
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1answer
471 views

How do airliners facilitate in flight calls for mobile phones?

How does an airline facilitate in-flight calls for mobile phones? I would guess that over open water in flight calls are relayed by an on board link to a communications satellite. Such a system ...
43
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12answers
31k views

Why don't all commercial aircraft transmit GPS data in real time?

It seems strange that trucks and taxis can be set up to transmit GPS data in real time but aircraft cannot. Wouldn't this be a useful function and feasible to implement?
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6answers
16k views

Is it possible for a modern commercial airliner to stop being tracked without substantial mechanical failure?

I was speaking to someone about the MH370 incident, and they suggested that a hijacker could turn off the device that sends the plane's current position, resulting in the appearance of a catastrophic ...
12
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1answer
3k views

How do I tell a Garmin 430 not to exit a hold?

Let's say that we're directly west of CATLI and have been cleared direct CATLI for the RNAV approach. We load the approach into ...
4
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1answer
896 views

Are there aircraft exemptions for CPDLC in the NAT area?

Another question lists the aircraft that are exempt from the EASA CPDLC rule. Is there a similar exemption for aircraft operating in the North Atlantic?
8
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1answer
4k views

Which airplanes are exempt from Europe's 2015 CPDLC (Link 2000+) requirement?

In February 2015, all flights above FL285 in EU airspace are required to have CPDLC/Link 2000+. However, I have been told by an avionics provider that some aircraft types are exempt from the ...
7
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1answer
2k views

How do aviation GPS navigation systems report GPS accuracy?

While looking over a tutorial on how to operate the Garmin GNS430, I couldn't find any info on how the device would report a degraded or low accuracy signal. What are the accuracy requirements for ...
33
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3answers
3k views

Could the CVR and FDR record to the cloud?

Another enthusiast question. I watch a lot of the National Geographic Channel's "Air Crash Investigation", for better or worse, and it seems accident investigators make tremendous use of the Cockpit ...
6
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2answers
2k views

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 ...
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2answers
2k views

What are the technologies used in A320 autopilot? [closed]

In the newest aircraft, autopilots are of paramount importance, but how are they designed? What is the hardware used to run them (I guess it is quite different from my laptop)? What is the software (...
7
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2answers
3k views

Do 121.5 MHz ELTs have to be replaced with 406 MHz models?

There has been a lot discussion about replacing 121.5 MHz emergency locator transmitters (ELTs) with 406 MHz ELTs, since 121.5 MHz ELTs are no longer monitored by satellite. Are private planes ...
16
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2answers
5k views

When should a transponder be used?

When should a transponder be turned turn on? On the ground? Always in flight? Only when required: during radar service (flight following), above 10,000ft MSL, inside the Mode C Veil, or on IFR flight?...
23
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3answers
2k views

What is ADS-B and who needs it?

I read that ADS-B is required by the year 2020. What does this mean? What is ADS-B used for, and who needs it?

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