Questions tagged [avionics]

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

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79 views

Is there a switch to dim or increase the light on the AOA gauge in the F-16?

There is a direct control switch to dim or increase the light on the AOA gauge in the F-16? Where is it located? Please share a picture with the panel if you can.
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3k views

What happens with the avionics if in midair there is loss of power or fuel flow interrupted? [duplicate]

What happens if in midair there is loss of power, how will the avionics perform in such a situation (cockpit display, flight plan)?
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Why don't aircraft have DME that can automatically convert the slant range to ground range?

Knowing that $a^2 = b^2 + c^2$ where $a = \text{slant range},\ b= \text{ground range},\ c = \text{height}$. Why can't the DME equipment which calculates the slant range then just convert it to the ...
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2answers
285 views

What does the Emergency Avionics switch do?

In almost every light aircraft I've ever flown, I recall their being a rocker switch marked "Emergency Avionics". Here's an example: It's never really occurred to me to ask an instructor/owner what ...
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2answers
102 views

Where does the Garmin G1000 Nav ID come from?

If you tune in a NAV frequency into your G1000 the ID of the Nav Aid will be shown next to the frequency after some time. In this example SEA: Source: http://...
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1answer
88 views

Can I do a dual VOR check on the ground?

I know that the regs are ambiguous on the subject, but does anyone have a good argument as to why or why not you can do a dual VOR check on the ground if the VOR signal is good? For my particular ...
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2answers
356 views

Credible Sport Project: Is it possible to revive the idea with modern avionics?

Synopsis: On a secret mission to rescue 52 hostages in Iran, Operation Credible Sport was created. The project consisted of a modified Lockheed C-130 Hercules and developed so that it would be able to ...
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1answer
60 views

Best Practices when removing/inspecting/mounting control surfaces?

I am looking for a better way to essentially "mount" the control surfaces from a Boeing 737-747-777-787 and MD-11's. The current process is to just remove them and strap to a table. The issues with ...
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1answer
88 views

What's the difference between a Sole Means Navigation System and a Primary Means Navigation System? [closed]

For bonus points, how you define a supplemental means navigation system?
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1answer
147 views

Where is the control loop of the actuator closed?

When electro-hydraulic servo-actuators are used for the actuation of control surfaces in aircraft, linear variable differential transformers (LVDTs) are used for position or velocity feedback. There ...
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1answer
161 views

Does anyone have photos of internal parts of ELAC, FAC, SEC or Boeing 777 flight computers?

I'm an electrical engineer and I'm interested in civil aviation, more specifically in fly-by-wire planes like the Airbus A320, Boeing 777 and others. But I fell in love with the Airbus A320 as it is ...
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91 views

What is the communication protocol for the side-stick in the F-16 or F/A-18?

The side-stick in the F-16 or F/A-18 communicates with the flight control computer to transmit the pilot inputs. This transmission uses a protocol. Which protocol?
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57 views

How to remove a course reversal (hold) on a Garmin 530W?

How can I remove a course reversal, (hold) from the FLP page on an RNAV approach ? If I want to do a straight in (NoPT) it will not allow me to remove the hold without removing the whole waypoint.
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60 views

Can I change the max bank angle on the Garmin G1000 in the C172SP?

I wonder if I can change the max bank angle on the G1000/GFC700 avionics in a C172SP, like you can on the MCP of the 737NG?
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2answers
191 views

Can you turn off the instrument panel lights?

Do general aviation aircraft generally allow the turning off of the instrument panel lights? By lights I am referring to any screens, bulbs or other devices which shine a light within the cockpit.
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What hardware standards should the flight control computer pass?

There are some standards for each part of the aircraft like actuators, sensors,... I could not find one for the flight control computer hardware. For example what are the environmental tests, or any ...
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Does DO 178C require a complexity test and compliance to specific values? [duplicate]

Assuming we are developing airborne software to be compliant with DO 178C, and assuming we were allocated a DAL B, does DO 178C require a complexity analysis test and compliance to specific values for ...
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61 views

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 ...
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1answer
76 views

Questions regarding VTOL and VMU inhibits [closed]

I have been working on a game which has futuristic VTOL-capable air and aerospace crafts. A player recently wrote that the stall warning (tone and aural) and AoA (tone and visual) were distracting/...
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1answer
237 views

What controllers are used in Airbus/Boeing fly-by-wire systems?

I was wondering, what controllers are used in airbus or Boeing aircraft fly-by-wire systems to control servos? Who manufactures such controllers, or are the systems controlled from flight computer ...
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4answers
2k views

If you were to fly an ILS in a knife edge would you receve GS and LOC be flipped?

because LOC and GS work the same way, if you were to fly one at 90 degrees bank would your information be displayed on the wrong indicators?
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2answers
161 views

What do the dashed extended green lines on this PFD mean?

The most important source of information for the pilot is the PFD
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3answers
332 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
224 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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159 views

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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1answer
214 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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149 views

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
250 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
100 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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2answers
187 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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3answers
2k views

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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1answer
352 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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4answers
544 views

Is it possible to hack an airplane while it's moving (in general)?

I recently searching Airbus Careers section, and I can say that I saw too many Cyber Security job positions. It was saying in the job description that there is a need of having knowledge about ...
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2answers
176 views

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
259 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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2answers
228 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
201 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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0answers
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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
129 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
237 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
282 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
200 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
340 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
391 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
169 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
294 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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1answer
95 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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164 views

B767 antenna identification

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

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