Questions tagged [avionics]

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

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243 views

Can an airline order a 777 with 787 flight deck avionics?

So an airline orders a 777, but instead of the cockpit in that, they request the 787 cockpit installed in their 777, is this even doable?
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Where is pure outside static air pressure indication on A320?

I'm looking for the indication of the outside static air pressure in the cockpit. Where is it located? One of the ECAM pages? Thanks!
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1answer
161 views

What is the difference between ACARS and ADS-B?

What is the difference between ACARS and ADS-B? For weather information in-flight or pre-flight which one is used?
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How does Garmin Autoland for General Aviation aircraft work?

Garmin recently unveiled a new technology for their G3000 General Aviation avionics system, the Garmin Autoland. They claim it can safely and fully autonomously land the aircraft in case of pilot ...
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202 views

What physical hardware does all the avionics on the B737NG run on? Some processor from the 1980s? Or some new and improved chip?

So, I am a tech guy and likes to fly (in sims) so, I was wondering what physical hardware powers all the 737NG's avionics and related systems (PFD, MFD, EICAS, GPWS etc). Is there an answer to this?
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Where to find general A320 E&E Compartment Information?

I'm student in electrical engineering and write my thesis on some topic of the e&e compartment. The main focus is on the computers of the A320 flightcraft, actually called E&E Compartment. ...
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1answer
212 views

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 But according to some shady blogs this STD has been deprecated or superseded ...
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1answer
81 views

How do rate gyros and other sensors send information to the flight control computer in an F-16?

How do rate gyros and other sensors send information to the flight control computer in an F-16? I mean is it a hardwired communication or it is done through a bus? If by bus, what is the bus called? ...
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173 views

Why did this old Japan Nakajima J1N airplane use a Yagi rather than a parabolic antenna?

Picture source. As per my understanding, a Yagi antenna is a directional antenna with limited gain, which it broadcasts or receives the microwave signal to and from the front side. It can only ...
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2answers
7k views

What exactly did this mechanic sabotage on the American Airlines 737, and how dangerous was it?

An American Airlines mechanic sabotaged a 737 in Miami An American Airlines mechanic accused of sabotaging a navigation system on a flight with 150 people aboard at Miami International Airport was ...
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What does “synoptic” mean in avionics?

I came across a mention of a display of "graphical aircraft system synoptics" on this page. I think in context that it means "status display" or "summary page"- the page that shows flap position, ...
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327 views

How does the F-16 side stick convert pilot input to an electrical signal?

In What is the motivation behind designing a control stick that does not move? the F-16's control stick is discussed. What is the method that is used to sense the pilot's input to the stick and ...
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What sort of sensors are used for sensing the positions of the control surfaces for the ECAM F/CTL page on Airbus aircraft?

During the pre-flight flight-controls-check how does the ECAM F/CTL page report on the actual positions of the control surfaces? What sort of sensors are these? Is it a proximity sensor? This is ...
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1answer
156 views

What triggers the trim horn and the “stabilizer motion” aural callout on the MD80?

I got conflicting or incomplete responses from various sources: There is an internal rate monitor looking to see the stabilizer is actually moving .08°/sec or -08°/sec. https://forums.tfdidesign....
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217 views

Is “hacking small planes” a separate or larger problem from/than general small-aircraft security?

Apparently the DHS has issued a "hacking alert" for small aircraft: The alert warns if a hacker gained physical access to certain small planes, they could attach a common device to its wiring. This ...
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1answer
154 views

Static Analysis as per MISRA C 2012 using DO-178

Does DO-178C have any guidelines on using static code analysis for level A software? As per Do-178C: Section 6.3 Software Reviews and Analyses Reviews and analyses are applied to the outputs ...
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Why does the SSM decoding vary between different A429 label types

For A429 there are different label types, for example: BCD, BNR, Discrete... These types have their corresponding SSM (Sign/Status Matrix) that is unique, for example an SSM of "00" represents a ...
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1answer
97 views

Do the DO-178 standards include guidelines on cyclomatic complexity?

Is there any guideline related to the cyclomatic complexity of software that complies with the DO-178C or DO-178B standards?
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1answer
222 views

What is that Boeing 757 custom cockpit interface?

Cropped; flickr.com, 2008 The photo is taken in cruise. The selected display shows takeoff data. There is also a send button (which hints at a datalink capability for communicating values). I ...
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1answer
234 views

Can Python be used onboard systems on aircraft or military jets? [closed]

Was working on a python related to avionics, came across a serious doubt whether code written in python would compile or run on a real time OS used in on board systems.
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1answer
190 views

How are electronic instruments and other equipment powered in a glider?

Radios and other electronic devices must be battery-powered. What sort of battery - and does its capacity impose a limit on flight duration, or can they be recharged in flight with a turbine?
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1answer
302 views

Sukhoi Superjet 100 avionics

The Sukhoi Superjet 100 features flight control system with characteristics copied from Airbus. Side-sticks, same control laws. But does it actually use any of the hardware or software from Airbus (...
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1answer
337 views

How does F/A-18 autotrack work?

This is about the alleged "UFO" video. However, I'm not interested in speculation about what exactly the aircraft being tracked in the video is. What is "autotrack" in an F/A-18 Super Hornet? Does it ...
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1answer
145 views

How do navigation displays depict turn anticipation?

I'm working on a navigation display for a simulation and I want to know if someone can explain me how the navigation display displays the "curved lines" for fly-by waypoints.I know how to calculate ...
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1answer
223 views

How is the center ILS used on the 747-400?

The aircraft has 3 ILS receivers, but only ILS L and R in the CDUs. How does the ILS C is put into action?
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89 views

Second career as an avionics technician

I will soon be retiring from my first career as an electrician on large construction projects. Planning on becoming an active private pilot again and I am basically an aviation nut. I am curious as ...
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1answer
141 views

B767 antenna identification

Can anyone identify which comms/nav system the circled antenna belongs to? Thanks.
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155 views

What is the purpose of the selected altitude/airspeed in ARINC 429?

What is the purpose of the selected altitude and airspeed fields in ARINC 429?
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233 views

How much does an air data module cost?

Curious how much Air Data Module and Angle of attack sensor costs, such that is used on commercial airliners.
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254 views

How many labels are defined in ARINC 429 for calibrated altitude?

How many labels are defined in ARINC 429 for calibrated altitude?
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138 views

What technologies exist to find an aircraft position after it crashed out of line of sight? [closed]

What is the best way in the manner of products to find an aircraft after it crashed out of line of sight. Are there defined standards, and what are the selection criteria?
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1answer
97 views

What is the difference between ARINC 429 labels 025 and 102 for Selected Altitude?

What is the difference between ARINC 429 labels 025 and 102 for Selected Altitude?
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85 views

Aircraft with load sensors in their undercarriage to calculate CG [duplicate]

In another question on SE aviation I read that certain aircraft have load sensors in their undercarriage to calculate CG. Which are these types? The technology to build load sensors into the ...
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1answer
240 views

What navigation systems were used by the Space Shuttle during reentry?

What equipment did the Space Shuttle orbiters carry to support navigation during reentry? Were there any differences between the individual orbiters in this regard?
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1answer
208 views

How and why would one call the cockpit of an A330 inside its nose gear bay?

According to this A330 call panel diagram, there is an option to call the nose gear bay with the MECH button. Where is the connection for this in the nose gear bay, and what would it be used for? The ...
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1answer
400 views

What is the Space Shuttle's command law?

The Space Shuttle was fly-by-wire. In today's fly-by-wire systems, the command law commands either the load factor and the roll rate (e.g., A320's normal law), or the surface control deflection (e.g., ...
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1answer
415 views

Is it legal to install a TACAN receiver on a civilian aircraft?

It is legal to use the DME from a VORTAC station (see Is it possible for a civilian to use a VORTAC station? for details), but is it also legal to use the TACAN for bearing determination? This would ...
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1answer
106 views

Flight Mode in cellphones and in Flight WiFi access [closed]

More and more flights have in flight wifi. On the other hand, the standard pre flight announcement still tells to switch off phones or put them in flight mode. So, once the in flight wifi is turned ...
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1answer
135 views

How does a G1000 equipped with a GDC 74 calculate IAS from dynamic pressure?

How exactly does a G1000 system equipped with a GDC 74 air data computer calculate the indicated airspeed that is displayed on the PFD from difference between the total and static pressure (i.e. ...
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3answers
7k views

Why are on-board computers allowed to change controls without notifying the pilots?

Recently we've had the 737-MAX debacle, where it increasingly appears that the MAX on-board MCAS system repeatedly would issue nose-down events, leading to the Lion Air crash, and possibly another ...
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What kind of testing do new aircrafts go through in terms of avionics and software upgrades? [duplicate]

I am a UX designer, so my bread and butter is dealing with issues around software user research, information architecture and interaction design. I am very interested in avionics design but ...
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1answer
180 views

If the Meteor BVRAAM is the best AAM, and the APG-81 is the best radar for detecting aircraft, then why don't all fighter aircraft simply use these? [closed]

Why are some missiles incompatible with some aircraft? If fighter A has better radar and missiles than fighter B, then why isn't it possible to simply integrate the better radar and missiles into ...
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3answers
394 views

How is device control software checked for quality?

Many, many reports on the now infamous MCAS suggest a software patch is forthcoming in the next several weeks that will address the confounding single point of failure with the two AOA sensors that ...
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2answers
519 views

On a modern Aircraft like the A320 or B737, is it possible to disable computer interference with the control inputs of the pilots?

One more question due to the recent and unfortunate events in the case of the second ever B737 Max 8 crash. As far as I know, the first of the two crashes was caused by the MCAS System, that ...
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1answer
308 views

What does a white diagonal line mean on an Airbus ECAM DU?

When my A321 powers up, the lower ECAM DU shows only a diagonal white line. What does it mean and what would be the fix?
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998 views

Is there a type of instrument/display that guides pilots along a certain path?

What do you call an instrument that can help a pilot fly along a predetermined flight path (e.g. path thru GPS coordinates), showing them when they stray a little so they can correct? Not a control ...
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77 views

Hardware evaluation board for safety critical avionics software (especially Guidance and Autopilot)

Can anyone provide me examples of evaluation boards for prototype testing of guidance software including autopilot. I am looking for boards that are proven, stable and successful with support for any ...
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1answer
249 views

What principle does the attitude indicator in the G1000 use?

The heading indicator in the G1000 uses a magnetometor, but how can the attitude indicator work in the G1000? Does it work with a tilt sensor, rate sensor or accelerometer?
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1answer
302 views

Are there any safety or technical reason airlines do not display flight information to passengers in real-time?

A newer addition to commercial airliners is seatback screens, that allow the passengers to watch movies, TV, and so forth. On most airlines, there is also a map, that shows you the aircraft's flight ...
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1answer
531 views

What sort of control mechanisms (i.e., PID controllers) do modern FBW aircraft use?

It's a well-established fact that aircraft like the Boeing 777, and all Airbus passenger aircraft that were designed after the A300, feature a digital fly-by-wire control system. Considering the ...