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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5
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2answers
909 views

Flex temperature isn't actually “fooling” the FADEC, right?

I'll be using Airbus terminology here because that's what I know, but I guess the concepts are universally applicable. The way I understand flex temperature is: It's a user interface for pilots to ...
3
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1answer
185 views

Is it possible for Mig 21 at corner speed to extend the flaps to minimize the turn radius? Or this is not an option?

The corner speed is around 330knots if you want to turn better than the enemy is possible to lower the flaps?
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1answer
277 views

What are the missing elements to mandate airliners to have an AoA indicator? [closed]

ONGOING EDIT NOTE (By OP) This question is right now being comprehensively reworked to make it less broad over the course of the next number of days. (That's being done mainly offline, so as to ...
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0answers
137 views

How can the fuel decrease evenly from both wing tanks when an A320 is running on APU only?

I stumbled over this sentence in a training material about fuel leak: "If the fuel quantity symmetrically decrease in both wing tanks and the fuel quantity in the center tank decrease, the fuel leak ...
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4answers
355 views

How do slats actually work?

I want to know what is the difference between slats and flaps and the mechanism of the slats This what I know and researched about flaps: Flaps are a kind of high-lift device used to reduce the ...
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0answers
30 views

HEPA filters and Coronavirus [duplicate]

I've been told that the Corovirus size is around 100 nanometers. I know that the HEPA filters in the aircrafts, say A320 type, can eliminate up to 99,999% of all viruses and bacteria. Can they also ...
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1answer
53 views

Where can I look for news regarding what's happening in aviation around the world? [closed]

Websites or magazines which keep me updated and where I can gain knowledge on what's happening around the world. Apart from International Airport Review, I'm already on that. Thanks
6
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1answer
200 views

Why is parking brake set OFF before jacking?

I have a question about the procedure to jack the aircraft for wheel replacement. According to the manual, it required to set the Parking brake OFF before starting jacking at the Main Landing Gear. ...
0
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1answer
98 views

What do left handed F-16 pilots do about the right side stick? [duplicate]

I was just watching a video about the Thunderbirds and Blue Angels doing their city fly overs and realized that the F-16 has a right hand side stick, which begs the question "what do left handed F-16 ...
11
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0answers
252 views

Why does the P-3 Orion use an engine driven compressor instead of bleed air for pressurization?

In another question, an answer mentions that the P-3 Orion uses a gearbox driven compressor for cabin pressurization, even though the aircraft uses T-56 turbine engines that supply bleed air in other ...
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2answers
104 views

Is rudder deflection sufficient to maintain directional control on the runway at high speed, or is nose wheel steering needed?

If a fighter jet veers off the runaway, is nosewheel steering needed to counter, or can directional control be maintained with the rudder deflection alone? Is there a chance that the rudder ...
7
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1answer
390 views

Was the March 2019 Rafale jet ejection incident investigated?

This is one of the wildest stories I’ve ever heard of. Then again, this is CNN’s disaster-a-minute-for-ratings kind of reporting. https://www.cnn.com/travel/article/france-fighter-jet-ejection-scli-...
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1answer
260 views

What if one of the navigation lights failed to function on a certified aircraft?

What is the implication if one of the navigation lights failed to function, would it affect the airworthiness certificate of the aircraft?
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1answer
1k views

Why does Thrust Reverser need to be operative during the cargo door operation?

It is stated that when the Electric Pump push button is depressed, the electric pump is automatically running as long as the cargo door selector valve is set to either OPEN or CLOSE position. During ...
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0answers
51 views

Why some airliners landing gear levers have “up” and “off” positions? [duplicate]

As I understand the difference between both is that "off" cuts the hydraulic pressure that retracts the gear, but why can't this be handled by the system itself and needs pilot intervention? Are they ...
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2answers
192 views

What is the maximum height for deploying a parachute? [closed]

i see a detachable plane cabin project .When an airplane crashes, the human toll is generally heavy. Based on this observation, Vladimir Tatarenko, a Ukrainian engineer who worked in particular for ...
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2answers
507 views

What is meant by a “pressure system” in FAR 91.205?

FAR 91.205 states: § 91.205 Powered civil aircraft with standard category U.S. airworthiness certificates: Instrument and equipment requirements. (a) General. Except as provided in ...
4
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1answer
240 views

Why is engine #1 still used when taxiing with one engine?

According to the answer in this post Taxiing with one engine: Is engine #1 always used or do they switch? Engine #1 is used because it pressurizes the green HYD system which powers the Nose Wheel ...
5
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1answer
126 views

Can APU start in-flight using RAT or battery power?

Is it possible for a passenger jet to start its APU using power from the RAT? If so, are there plausible benefits to doing so (like supplying hydraulic pressure to the wheel brakes)? Do modern ...
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0answers
40 views

A320 IR2 MEL OPS Procedure

The A320 34-10-05B IR2 MEL OPS procedure additionally calls for Air Data switching to FO3. When ADR 2 is working fine why replace its data on the FO PFD when only IR data is lost?
6
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2answers
319 views

Do helicopter rotors have anti-ice systems like propellers and wings?

Icing disrupts the aerodynamic qualities of wings and props, is there a similar danger with helicopter rotors? Are there de-icing systems to prevent this?
0
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1answer
97 views

What is the difference between the Flight Control Systems of different F16 models?

it is mentioned that the F16 A/B variants had an analog FCS, while the C/D version introduced a digital FCS starting from block 40. Can somebody elaborate on the differences between them and point me ...
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1answer
94 views

How does MCAS communicate with other systems to know if the flaps are retracted or not?

How exactly does MCAS communicate with the flaps setting to know if the flaps have been retracted? I just noticed on the preliminary report for ET302, the flaps were set at 5 degrees. It doesn’t say ...
3
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1answer
250 views

Does the Ground Proximity Warning System (GPWS) see through clouds?

Or can it only detect terrain on a clear day or night? I’m mostly asking because of PIA268 I know GPWS is much more reliable in todays time, and I’m unsure if the accident flight even had a GPWS ...
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0answers
153 views

Does an Airbus FAP display any indication of a full waste tank?

I have doubt about controls on FAP regarding Waste Tank. I understand when crew person clicks on Input On button, FAP displays the quantity of Water and Waste tank. But what happens when Waste Tank ...
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2answers
5k views

How do pilots know that the switch/knob they just switched on/off actually did what it's supposed to do?

With the plethora of switches/knobs/buttons etc present in airplane cockpits, how can pilots be really sure that a button they just pushed (either to enable/disable some electronic system or move some ...
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0answers
203 views

How efficient would it be to have a plane with the cockpit in the back?

Would it be efficient to have a passenger planes cockpit move to the back of the plane, rather than the front? What I have in mind is cameras on the fuselage and nosecone that connects to the cockpit ...
3
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1answer
102 views

Why will windshear inop illuminate after landing in an MD-83?

Why will windshear inop illuminate on the annunciator panel after landing or before starting taxi in a McDonnell Douglas MD-83?
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3answers
170 views

How to identify different pipes / hoses on aircraft engines?

When looking at an aircraft engine (without any cowlings) is there an easy way of identifying what pipes are for fuel, air, oil, hydraulics etc..? Maybe certain fluid pipes are different size ...
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3answers
446 views

How does the engine wash improve engine performance?

According to maintenance manual, we usually carry out engine wash (CFM56) with pure water as scheduled task. Pure water is injected into the engine from the LP compressor inlet while the engine is ...
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2answers
159 views

Maximum Flaps extended speed Vfe for full or partial flaps?

I fly Piper Archer/Warriors and the POH states "Maximum Flaps Extended Speed (VFE) – Do not exceed this speed with the flaps extended." I try not to but I occasionally may exceed Vfe with one notch ...
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1answer
4k views

Does the Antonov An-225 have an Auxiliary Power Unit (APU)?

Most APUs are installed in the rear, see the above image of an Airbus A380 as an example. On the An-225, no APU exhaust is visible at the rear of the aircraft. So does the An-225 have an APU, and if ...
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0answers
34 views

In aircraft air conditioning systems what are the differences between the air cycle machine system and the displacement blower type system?

I have seen reference to both these different air conditioning systems but can't understand what the key differences are and where each system would likely be found.. I.e is one system preferable over ...
5
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1answer
419 views

Is a stall warning Horn required to fly?

I need an answer in reference to 23.207. I looked there and couldn't say 100% if it was a yes or a no. Thank you for all your time. cheers
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1answer
156 views

Do aircraft need special modifications for polar routes?

Does an aircraft need special modification for polar routes?
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2answers
263 views

What happens when auto-pilot fails over the ocean?

Let’s assume the current location puts the aircraft 2 hours from the nearest airport, but the destination is 2 1/2 hours away. Would the pilots hand fly the rest of the way? Are they allowed to fly ...
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1answer
87 views

What is the difference between staged and unstaged fuel manifolds? [closed]

Also, I would like to know the difference between pilot, primary and secondary fuel flow.
3
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1answer
118 views

Why do some airplanes have a vertical rudder hinge while some others are canted?

I was thinking that canted rudder hinges are used for modern aircraft while the vertical ones are used for old slow airplanes. But it seems that I was wrong since the SST Tupelov Tu-144 and the ...
2
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1answer
576 views

What is this “stick” on top of Cessna 152's wing, and how does it work? [duplicate]

What is this device? What is it for? Seems that some variants have only one, while some others have two. Added: As some have two, so what are they? The answers and comments have not explained which ...
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1answer
58 views

Where can Cirrus Aircraft VisionJet Oleo Struts Material and Dimension Specifications be found? [closed]

I am looking to get hold of Cirrus Aircraft VisionJet Oleo Struts Material and Dimension Specifications. Can anyone point me to or share where I can obtain these details. So far, I have been able to ...
2
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1answer
316 views

Why couldn’t Boeing just use the stab trim system to do MCAS job?

If I’m incorrect in the question, please correct me. From what I’ve read and gathered the stab trim system essentially did the same before hand? It relies on AoA? And if so, did the computer for that ...
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2answers
202 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 ...
2
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1answer
383 views

How does a flux gate compass system work?

I have heard of gyroscopes and AHRS being used for heading indication, but I haven't heard of a flux gate compass system until recently. What are the principles of its operation and what types of ...
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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, ...
6
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1answer
364 views

Why does the B737NG need electrical power for aircraft towing?

I have read the AMM for towing and one of the mentioned steps is to supply electrical power. Is it because you need power to turn on the hydraulics in order to pressurize your brakes? For B737NG
10
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1answer
308 views

Which commercial aircraft can fly Micro-SLOP procedures?

"Strategic Lateral Offset Procedures (SLOP) are approved procedures that allow aircraft to fly on a parallel track to the right of the centre line relative to the direction of flight to mitigate ...
3
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1answer
172 views

What type of jack is the flight interphone on transport category aircraft?

Recently became an A&P and part of my job is to be on the ground communicating to the pilots during push backs. Started shopping for a headset and have seen various ones with different adapters ...
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2answers
144 views

What is the future for auto-pilots? [closed]

What is going to change with auto-pilots on commercial aircraft in the next decade or so? Will airlines allow an auto-pilot to control an aircraft when it lands and takes off? Will we start using
5
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1answer
3k views

What's inside the packs? (Airbus a320)

I have some questions about ATA 21, how packs works?... I mean, what's inside them?, what are their mechanims? And How the warm air becomes into cold air?. (On a airbus A320) I'm starting my major at ...
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1answer
126 views

How exactly are checklists shared between the pilots?

Plane startups are shared between the crew But how exactly? Does the captain do the startup and then ask the copilot if everything is correct? How exactly does it work? Is it aircraft specific or ...

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