The essential systems found on most aircraft, including including power plants, fuel systems, electrical systems, and flight instruments.
2
votes
1answer
60 views
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 ...
0
votes
1answer
59 views
TCAS II manoeuvres? [duplicate]
What manoeuvres does the TCAS II advise the pilot to make?
Is it RA or TA ?
0
votes
0answers
39 views
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
2
votes
0answers
51 views
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 ...
1
vote
2answers
103 views
General Aviation Ice Protection
Does anyone know if regulation exists 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 boots ...
7
votes
1answer
233 views
What are those sensors on the forward (Airbus) A321neo fuselage?
What are those sensors on the forward (Airbus) A321Neo fuselage? If it helps, this is wow air’s TF-DTR.
-1
votes
1answer
143 views
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)
2
votes
2answers
134 views
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)....
0
votes
0answers
30 views
Aircraft EFIS Configurability [duplicate]
What should be the general logic to automatically switch between different pages of EFIS during failure of single or multiple displays?
2
votes
3answers
248 views
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 ...
0
votes
1answer
53 views
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 ...
0
votes
1answer
58 views
How do you indicate whether the supply of power to the gyroscopic instruments is adequate? [closed]
Is there an instrument to indicate this?
0
votes
0answers
57 views
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 ...
1
vote
1answer
103 views
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 ...
0
votes
1answer
55 views
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 ...
6
votes
1answer
365 views
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 ...
0
votes
0answers
156 views
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) - ...
0
votes
1answer
73 views
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?
2
votes
2answers
218 views
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?
1
vote
1answer
94 views
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.
...
1
vote
1answer
263 views
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 ...
3
votes
1answer
412 views
What is the fluid released from the tail of this clipped Turkish airliner?
A Turkish A321 airliner was hit by an Asiana A330 on 13 May 2018 at Istanbul Airport. It seems a large amount of fluid was released from the damaged section. What is the fluid? There is no APU up ...
0
votes
1answer
98 views
How to calculations deviation on a magnetic compass and effect of it?
I am told to do self study and mainly for the part of the formula reading and i did some research and don't understand a single thing that i read online http://opac.vimaru.edu.vn/edata/EBook/Magnetic%...
5
votes
2answers
351 views
What is the risk of leaving the MAN START PB 'ON' on the A320?
During a manual start on a A320, the ENG MAN START P/B opens the start valve which then runs the starter motor. During the MAN START process, at some point, the start valve closes automatically. What ...
1
vote
0answers
185 views
How does the Boeing 787's Cabin Air Compressor work？
How does it work in normal, overheat and over-pressure conditions? What is the function of the variable diffuser actuator?
5
votes
1answer
238 views
White light illuminating the engine coming on at intervals in flight; Curious what's the protocol?
I was recently flying Air China from Beijing to Bombay & happened to seat on the Window seat close to the wings.
I could see the engines and there was a light that could illuminate the engines. ...
9
votes
2answers
235 views
Does the flight crew in big airliners hear the cabin crew PAs?
In big airliners, does the flight crew hear the PAs the cabin crew is doing to the passengers, e.g. on their headsets? If not, how do they make sure they’re not talking simultaneously to the ...
0
votes
2answers
126 views
What minimum radio communication equipment is required in a homebuilt aircraft in India?
Let's say I am building a single seat aircraft for flying in one's own country(India). What should be minimum set (Not only from compliance prospective but to have core set of communication for ...
2
votes
1answer
118 views
Does the parking brake provide additional deceleration in an abnormal situation?
During a rejected takeoff at a speed > V1, you obviously try to stop with all available means since a runway overrun is a very undesirable result. In this case, could using the parking brake in ...
0
votes
0answers
49 views
Does the Flight Data Recorder store the data locally or send it to an offsite backup while in flight? [duplicate]
I was wondering, what a black box actually does ? Does it store the in flight data, in case an accident should occur or it's sending it to an offsite backup while in flight ? And if it stores the data,...
0
votes
1answer
114 views
Can I use parachute fabric to cover an aircraft fuselage and wings?
...
Are there disadvantages to using parachute fabric to cover an experimental aircraft? So far I observed the following:
I believe I put this fabric in an open place for a year
I found no cracks ...
8
votes
2answers
698 views
Why are parking brakes not used for parking jetliners?
From the question 'Do I Set the Parking Brake On the Ramp?' it is concluded that you do not set the parking brake when parking the aircraft.
The question concerns small aircraft which can be parked ...
4
votes
1answer
270 views
Why disable stall warning based only on low airspeed, rather than multiple criteria?
One of the factors that potentially contributed to the Air France 447 crash is that the stall warning was disabled when the airspeed fell below 60 knots.
I understand why this is -- you don't want to ...
3
votes
2answers
198 views
What solutions are there against deep stalls?
What solutions are there against deep stalls?
According to SKYbrary:
Aircraft with a T-tail design are often configured with a Stick Pusher system to help prevent the mainplane angle of attack ...
4
votes
1answer
119 views
Do any newer production aircraft use venturis as a backup vacuum source?
I began my flight training in a Cessna 120 with 2 venturis as the source of vacuum for my DG and TC. They worked well in flight.
Are there any aircraft with deployed/deployable venturis out there? ...
2
votes
1answer
244 views
What is the difference between an APU and an ATS?
Is there a big difference between what an Auxiliary Power Unit (APU) and an Air Turbine Starter (ATS) system actually does?
My understanding is that an APU provides power for the electrical systems ...
2
votes
0answers
62 views
Are the details of flight control laws the same for every fly-by-wire Airbus aircraft or are they only the same within the specific family?
I was wondering if someone learns the details of every single flight control law for the A320 family, does that knowledge still apply to all the other Airbus aircrafts? If not, what are the ...
6
votes
1answer
232 views
(B737s) Why is the automatic activation range of the AUTO mode in flight limited to “between idle and 5%”?
This is the explanation on the Engine Start Switch in the 737 series FCOM. What might be the reason why the automatic activation range of the AUTO (or OFF) mode in flight limited to "between idle and ...
3
votes
1answer
719 views
What dictates the A320's 'emergency ram air inlet' operation?
Why does the emergency ram air inlet flap open when delta p is greater than or equal to 1 psi on the A320?
Below is the extract I was reading from the FCOM. Why has the figure of 1 psi been set for ...
3
votes
3answers
308 views
What design features or systems help to prevent a hard nose landing?
Pilots perform perfect manual landings almost all the time with the nose wheel touching down softly and elegantly. When landing an aircraft of any size really more so for the jumbos and super jumbos, ...
3
votes
1answer
307 views
Why doesn't the A320 pack flow indicate HI as it should?
When on ground with APU bleed on and both engines off I have noticed a number of times that the pack flow isn't at the HIGH setting why?
As per the FCOM it states that when APU bleed is on the PACK ...
3
votes
1answer
1k views
What happens if an aircraft's hydraulic system starts leaking during a flight?
What will happen if hydraulic fluid starts leaking during a flight? What will happen to the overall performance of the flight, and how will the pilot compensate for the loss of the system?
2
votes
1answer
245 views
2
votes
1answer
1k views
What is the difference between variable and transient bleed valves?
What is the difference between variable bleed valves (VBVs) and transient bleed valves (TBVs)? What is their range of operations? Can they be used at all airspeeds?
9
votes
2answers
2k views
Why does the Boeing 787 use Cabin Air Compressors (CACs)?
What are the advantages of this new air conditioning system compared with the traditional engine bleed systems? More engine output power, or easier adaption to future aircraft design?
11
votes
3answers
3k views
Why is it called “STBY RUD” on a Boeing 737?
(Source: b737.org.uk)
Anyone knows why "STBY RUD" is named "STBY RUD" when the selection of the switch position activates the standby hydraulic system as well as the standby rudder system (by opening ...
11
votes
3answers
1k views
When does a 'flaps/slats misconfiguration' warning sound during takeoff roll?
If a flight crew begins their takeoff roll and don't have slats and flaps configured properly, when does the system know when to sound the alarm? If it actually sounds during the roll itself, that ...
4
votes
3answers
660 views
How are the services kept running on a plane without an APU? [duplicate]
I have seen several aircraft that do not have an operative APU, so how are lights, air, and other systems kept running?
9
votes
1answer
385 views
What is this fuselage-side aerial used for?
(instagram.com)
I have seen this picture, and this feature on the port fuselage called my attention. Does anybody know the purpose of this?
45
votes
9answers
9k views
Is this opinion on personal computer flight simulators too strict or is it actually true?
A couple of days ago I had a discussion with a commercial pilot and his opinion on personal computer flight simulators were a bit surprising to me.
He said that flight simulators, even with ...
