Questions tagged [aircraft-systems]
The essential systems found on most aircraft, including power plants, fuel systems, electrical systems, and flight instruments.
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Why do Airbus and Boeing have different approaches to bleed air systems? [closed]
Reading Wikipedia and other questions like this, made me curious as to why Boeing uses bleedless architecture for its B787, while Airbus thinks differently for its A350 XWB (and Rolls-Royce thinks the ...
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What is an example of a system like MCAS?
The related question "Is it common for automated control systems to use non-redundant sensors?" does not ask about a specific example, nor are specific examples provided in the answer.
The criteria ...
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Where exactly are the heating elements in the PA-28-180's pitot mast?
I am flying a PA-28-180 but have been unable to find where inside the pitot mast the heating elements would be.
I would like to know this to verify my assumption it does not work in the airplane I am ...
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Why are fuel pump switches separate?
Since engines are run only when the fuel pumps are on and vice versa , why are there separate switches for this? Why can't it be automated ?
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How does a circulation control helicopter work
This essay describes that this helicopter uses circulation control of the rotor for cyclic and collective control, but not how circulation control works.
https://ntrs.nasa.gov/archive/nasa/casi.ntrs....
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Is the Boeing 737 MAX 8 MCAS exceptional in operating when autopilot is off?
To the uneducated reader it seems strange the Boeing 737 MAX 8 MCAS system only operates when autopilot is off. I understand the reasoning behind why it was implemented to operate when autopilot is ...
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What are the "certain" flying scenarios in which the Boeing MCAS is supposed to assist pilots? [closed]
Boeing bulletin issued last November said
"MCAS provides automatic nose-down inputs to assist pilots in certain
manual, flaps-up flying scenarios, especially at slow airspeeds and
high AOA."
...
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What is the technique or procedure to disable/disengage the MCAS on Boeing 737 Max 8 & 9 Aircraft?
What is the technique or procedure to disable the MCAS and manually fly the Boeing 737 MAX 8/9 Aircraft?
To clarify my question, what I'm asking is can the pilot disengage the MCAS and if so, how do ...
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Pitot tube pressure question
I have this question is the pressure measured in the entry of the pitot tube the same when the plane is flying headwind or turning a 360 degree turn while maintaining the same indicated airspeed?
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Do you have to lubricate the shock strut?
I have a school report about the lubrication on the shock strut and I was wondering if there is a specific type of lubrication they apply it on.
This is for Cessna 150-152
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How does a single engine tail wheel landing gear airplane turn when it is on the ground?
Say Cessna 140 as in this video, look like no additional device to make it turnable when it on the ground. It is a single engine and a tail wheel landing gear. Then, how does it turn?
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Where do standard torque values in maintenance manuals come from? [closed]
Maintenance manuals of today's civil aviation aircraft (from both Boeing (e.g., B-737) and Airbus (e.g., A320)) have special chapter to describe "standard torque value" for fasteners and connections. ...
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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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Can the real time operating system used in aviation equipment be certified by itself?
Can the real time operating system used in aviation equipment be certified by itself, or must it be a part of some software certification effort?
I'm asking for getting a certificate of 178C. I don't ...
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Turbofan engine 2 spool - Turbine drives the compressor or Starter drives the compressor [duplicate]
I have read somewhere regarding turbofan engine 2 spool that says
"LP or HP turbine will drive the LP or HP compressor"
"During engine starting, the starter will drive the HP compressor via the ...
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In normal condition, is the Airbus A320 APU fuel supplied by the main engine boost pump only?
I have a question relating to APU fuel system.
As said in material, there are 2 system supplying fuel for APU to operate. 1st one is primary and 2nd one is secondary.
In the 1st system or low ...
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How is the F-22's nacelle/engine bay ventilated?
How is the aircraft skin around the engine bay in the F-22 cooled?
As in the F-35, there are scoops below the wings, which provide ram air around the engine bay, but you don't see any scoop around in ...
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Hydromechanical/Electronic fuel control system [closed]
Can someone explain the picture below which represents hydromechanical/electronic fuel control? What's the function of the solenoid on the picture below? What are the differences between solely ...
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Where can I find drawings or diagrams of the Boeing 737-800's internal layout? [closed]
I am working on an alternative fuel system for my final school research. I am applying it to the 737-800. Now I could not find info on how the internals are situated. Of course pictures of the cabin ...
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Why were these crash location not located via ELT?
On Jan 14th 2019, at 9.10 Indonesia time, the CVR of the crashed Lion Air JT-610 has been found. Another vital device was found earlier.
There are three modern airplanes crashed in to water in ...
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What is the difference between FMCF and AIMS on the 777?
What is the difference between Flight Management Computing Function and Airplane Information Management System on B777?
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In an airplane wing, which control surfaces are primary, and which ones are secondary?
I got this device detail of a wing. Those parts are:
1: wingtip fence, one of the wingtip device beside winglet.
2 & 3: aileron.
4: flap track.
5 & 6: slat.
7 & 8: flap.
9 & 10: ...
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Electrical systems in light aircraft
How does the electrical system in a light aircraft such as a Zenith CH-750 or Cessna 150 work compared with electrical systems in larger aircraft? Are the system is different than the electrical ...
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Using the APU for heating on the ground with engines shut down
I would like to refer one technical question to you that I couldn’t able to explain myself. It is from the FCOM Supplementary Procedures Chapter of a Boeing 737 Classic. This question concerns the use ...
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How does pendulous vane work?
The pendulous vane uses precession to correct a gyro by small jet air, but I do not know how it works. As far as I study, when gyro is tiled, one of the doors open and the other one is closed. This ...
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What is the exact purpose of the string attached between front fuselage & the tail section of the transport aircraft's? [duplicate]
]2 228]3]3
Usually I got to notice a string attached between front fuselage to rear tail section of the transport aircraft's, what exactly might be the purpose or function of it? But comparatively, I ...
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Is the purpose of variable pitch propellers to maintain an optimal angle of attack?
I recently had a discussion with an aviation expert, who works as a Flight Instructor, about constant speed propellers - variable pitch propellers - on light piston aircraft.
I have always known that ...
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Why does Germany is not so advance in aircraft development? [closed]
I tried to see what countries are the most advance in developing aircraft. I found that Germany is not so advanced (CMMIW). Indeed, there is Dornier there beside has share in AirBus. I don't know ...
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Why do the A320's centre tank pumps stop working 5 minutes after the low level has been reached?
I'm new here and I'm in training course for Airbus A320. In the training material, it's said that the centre tank pumps are controlled to stop automatically 5 mins after the low level fuel has been ...
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What is the difference between redundancy and fault tolerance?
What is the difference between redundancy and fault tolerance in the context of aviation ?
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Can someone explain this glideslope question?
The glideslope deviation bar is covering the second upper dot. The required action to meet glideslope beam is to:
What does this question mean?
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What are the potential threats of having the landing gear dirt from mud in a rectractable landing gear airplane?
Recently I have been flying an aircraft with the landing gear very dirt with mud due to the parking area of the airfield on grass and the meteo conditions in recent days. I wonder what are the threats ...
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TCAS II manoeuvres? [duplicate]
What manoeuvres does the TCAS II advise the pilot to make?
Is it RA or TA ?
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How to compute actuator torque requirement for Variable pitch mechanism??
Suggest me any reference to compute the torque requirement for actuator/motor to control the pitch angle of propeller (Variable Pitch Propeller).
Thanks in advance
Arun Ravindran
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What is the material and font used on the panels of most cockpits?
I am working on a project for one of my aerospace engineering classes and was curious to see if anyone knew what type of material is used to make the panels of a cockpit (preferably a 737) as well as ...
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Are there requirements for ice protection for general-aviation aircraft?
Does anyone know if any regulations exist making it a requirement for general aviation aircraft to have ice protection systems?
And any insights on why general aviation aircraft tend to use rubber ...
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How was a looping possible with an Alaska Airlines plane? [duplicate]
Someone has stolen an empty airplane from Seattle Airport and crashed it down after performing some loopings. I am wondering how this was possible.
(Source)
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Does the 2020 ADS-B -Out requirement apply to aircraft with only a wind-driven generator (electrical system)?
Since my J3 Cub was was not originally certificated with an engine-driven electrical system it's clear the 2020 ADS-B-Out mandate (U.S.) does not apply (except where specifically noted in FAR part 91)....
user22445
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Why does load shedding still occur in jetliners (e.g., 787) when there is so much power available?
I had a few questions about how electrical generator works on an aircraft, the 787 to be specific although I know it is similar for all aircraft.
So the 787 engines have 2 VFSG each which are rated ...
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Lift and Drag Coefficients using load cell data
I have a MAV and I need to find out the lift and drag coefficients for the wing and tail. I am not available with a wind tunnel so I will be using a load cell along with a separate wind source. Now I ...
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How do you indicate whether the supply of power to the gyroscopic instruments is adequate? [closed]
Is there an instrument to indicate this?
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What is the difference between an Instrument and Equipment?
In an aircraft, what things is an instrument and what things is an equipment? For example the ILS, is the Antennas located in the runway considered to be an instrument or an equipment? Or is there ...
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How do check valves regulate the air in a multi-engine airplane's vacuum system?
This is one of the examples of a pneumatic power system in a multi-engine airplane. In systems like this, if one dry air pump fails - let's say the right-hand one - then the check valve manifold ...
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What is the ambient temperature used in RTCA/DO 160?
I was going through RTCA/DO 160D for some work-related issue. I went through the whole document but nowhere does it define what the "ambient temperature" value is? In one place it defines +15 to +35 ...
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Are pressurized passenger aircraft usually completely airtight?
Various sources on the internet indicate that the passenger cabins on pressurised airplanes are not 100% airtight. I'm not talking about ventilation/pressure valves/cabin pressurisation system, but ...
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Will the new Boeing NMA be 'more electric' than the current B787?
I understand that the B787 is the 'most electric' aircraft to date, however there have been many issues with the plane, and I'm interested in knowing if the latest Boeing New Midsize Aircraft (NMA) - ...
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Why does an engine bleed system failure restrict operating elevation? [closed]
Why are airplanes not permitted to operate to/from airports at over 9,200 ft if Engine Bleed Air Supply System #2 is inoperative?
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Why is it necessary for pilots to have trim controls on fly-by-wire aircraft?
On Airbus family airliners why is it necessary for the pilots to have the facility to trim when there is no aerodynamic feedback through the flight controls?
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Is it possible to 'retrofit' electric flight control actuators to replace existing hydraulic actuators on aircraft?
Read a bit about the potential cost savings of replacing existing hydraulic aileron actuators on large commercial aircraft such as the A350/380 with electrohydraulic/electromechanical actuators.
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What is the overhead instrument panel (pictured) near the front galley area of an A320?
I have noticed this overhead instrument panel. It is convered by a transparent plastic lid with a small hole in the middle. Inside it has lot of switches. What is it supposed to do and who operates ...
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