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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Interview questions [closed]

I work for a large Part 135 company part-time and am fortunate enough to interview prospective new hires. For most of them, this will be their first professional flying job outside of instructing. I ...
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1answer
4k views

Why does the B-29 have eight oil needles?

In the image above, quiet flyer and I realized that there are 2 needles in every oil gauge, and there are 4 oil gauges. Well, why in the world are there 8 needles in total? And the optimal range arcs ...
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What are the advantages of using DC electric power over AC, as e.g. done in the EMB 135/145?

In this question I can see the advantages of using AC electric power over DC in large aircraft. However, Embraer decided to produce a "DC aircraft": the ERJ 135/145. What are the advantages ...
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143 views

How Jozza Bombsight worked?

I'm looking some information about the so called Jozza Bombsight used for example on board of the Savoia-Marchetti SM-79 during WWII. Thank you
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2answers
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Will my CRI CRI twin engine plane fly if I replace the engine with a single 15hp gasoline engine? [closed]

I'm using a lighter materials to rebuild plane, to cut down plane weight to 56kg and a 1.2m 3blades propeller.
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4answers
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What component of an aircraft generates its electric power?

What component of an aircraft generates the electric power to start the aircraft's engine? For a Rotax 912 engine, I think the magneto generates the electricity, but I'm not sure; I also think about ...
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3answers
200 views

Why don't all cylinders have priming lines?

Questions about the primer for carburetor engines. Why does the primer only spray fuel to three (sometimes just one) of four cylinders. (Like Piper Cherokee or Seminole) And is it true that priming ...
7
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2answers
230 views

Why would an artificial horizon's roll axis be different on ground and in flight?

Sorry, if I'm a bit verbose here, but since I don't understand the problem, I have difficulties to describe it. I created an artificial horizon using an Adafruit precision 9 DoF sensors and their AHRS ...
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1answer
87 views

What is the difference between aircraft integration and assembly?

I have never had a clear understanding of the difference between aircraft assembly and integration. My understanding is that putting together the airframe alone is assembly and putting together the ...
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1answer
90 views

Is flap-asymmetry protection on airliners still active even on the ground?

On aircraft with flaps, a general certification requirement is that it must not be possible for the aircraft to suffer a loss of lateral control secondary to an asymmetric-flap condition. This ...
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1answer
41 views

What does pneumatic operated and electrically controlled means? [duplicate]

I was going through A 320 FCOM and didn't understand this term
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What is the formula to calculate TAS from IAS [duplicate]

I have seen in flight simulators, that the Indicated Air Speed (I.e. IAS) isn't the same as the True Air Speed (I.e. TAS) Is there a formula coded into the aircraft to calculate this?
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What licenses should I get for the (flight) equipments that I want to make? [duplicate]

For making and selling all equipments of aircrafts what or which licenses should I get? and from where? Will I be able to sell them all around the world? Edit: This question is different than this one....
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1answer
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Does ELMS inhibit cabin pressure alarms on the 777, and would the MEC Override Vent be stuck open following an electrical failure?

I found this article rather interesting, but like most things on the internet, they can be wrong. I couldn't think of a better site to address this question. This user says: when ELMS takes over ...
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1answer
92 views

Fighter Jets speed [duplicate]

How does an aircraft measures (or calculates) its speed while in air? Which equipment or sensors are used for measurement of speed? Does it takes Earth as a reference frame for its speed measurement ...
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1answer
266 views

Can the Master Caution illuminate without the System Annunciator Panel on the 737NG?

Does the master caution light illuminate only with the System Annunciator Panel? Or is the master caution illumination also connected to the related system panels? I mean if there is an indication on ...
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1answer
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Viewing and capturing real time values of Tachometer measuring instrument on television set and computer monitor in Aircraft and Automobiles [closed]

https://en.wikipedia.org/wiki/Tachometer https://patents.google.com/patent/DE2500376A1/en Is it possible to view and capture real time values of a Tachometer in Aircrafts, Automobiles, Spacecrafts, ...
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64 views

How to know which NVIS Class is used in an aircraft?

I wonder if NVIS (Night Vision Imaging System) class for a fighter jet is fixed or not? Is it possible that the pilot can wear any NVG (Night Vision Goggle)? If I want to find out the NVIS Class that ...
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Does the order in which engines in commercial airliners are turned on matter? [duplicate]

I've seen videos on youtube where the pilots always turn on engines 4 and 3 (in a B747-4) first and then turn 2 and 1 on after pushback. Is there a reason behind this, and does the same reason apply ...
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2answers
124 views

What information is recorded in aircraft sensor and maintenance logs?

I was wondering what the sensor and maintenance logs in an aircraft look like and what are the values logged? Like maybe the engine temperature, altitude, exhaust temperature, etc. I know the data is ...
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Can I use Stihl fs250 engine for ultralight aircraft? [duplicate]

RPM 9000 Hp 2.2 Engine weight 6kg Plane weight 40kg Body weight. 70 Propellers(2blades) length 30 inches Wings length 120 inches
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Make a 3 engine turboprop electric or steam hybrid aircraft?

Was thinking about this, have a 2 engine regular turboprop with a third electric engine for extra performance (imagine a DC3 like the Conroy Tri-Turbo-Three). The 3rd electric engine would be run from ...
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2answers
245 views

What type of BITE is involved after installing a new display on an aircraft?

There are 3 types of BITE (Built-In Test Equipment): power up interruptive continues which one of these is being used after installation of a new display on an aircraft?
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2answers
314 views

How does an outflow valve work mechanically?

Under Environmental control and oxygen systems chapter of Aircraft Maintenance and Repair book by M. Kroes, there's an topic of working of the outflow valve The diagram is of a valve that also works ...
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1answer
92 views

What safety precautions are taken for an airline prototype test flight?

Regarding the software, the equipment and the personnel. Can the crew jump out of the plane with parachutes or is it a bad idea? Additionally, if you would compare the safety of today and the 1970/80s ...
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1answer
2k views

How does the fuel pump work in a PA-28 and when should I use it?

Just started flying again after 14 years and I'm taking this to the finish line this time. All my time, up till 10 am today, is in a C172. I did fly a PA 28-151 today and liked it. I do have some ...
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2answers
212 views

Ventral masts- what are they?

I have kids working on a model of a Boulton Paul Defiant, a WWII-era fighter plane. When we found images of this plane, it shows two rods sticking vertically down from the belly of the plane. Some of ...
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2answers
1k 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 ...
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1answer
309 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
424 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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2answers
408 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
1k 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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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
342 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. ...
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1answer
278 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 ...
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1answer
408 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
129 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
421 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
569 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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2answers
467 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
612 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 ...
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1answer
391 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 ...
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1answer
156 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 ...
2
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1answer
102 views

Why does the A320 IR2 MEL OPS procedure suggest to switch to ADR3?

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?
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2answers
719 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?
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1answer
180 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
114 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
304 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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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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