All Questions

31
votes
3answers
11k views

How difficult is it to simply disable/disengage the MCAS on Boeing 737 Max 8 & 9 Aircraft?

With regard to the Ethiopian crash of the 737 Max 8 aircraft, where according to preliminary reports, it appears to be related to the MCAS which is a safety system that pushes the nose down to correct ...
12
votes
2answers
760 views

What features enable the Su-25 Frogfoot to operate with such a wide variety of fuels?

It is widely attested* that the Su-25 Frogfoot's engines (the Turmansky R-95Sh and later the R-195) were designed to function using a wide variety of fuels, including diesel, gasoline, petrol, ...
2
votes
1answer
52 views

What are the checklist items for a runaway stab trim on a B737 MAX 8 and MAX 9?

This is a follow up question to this question. This question is not directly related to the MCAS system in the new B737 MAX aircraft, instead, my question is about the checklist for a runaway stab ...
1
vote
1answer
63 views

How many flights can be made under EASA permit to fly?

I understand the permit to fly is valid for 14 days, but how many flights can be made in that time?
1
vote
1answer
96 views

Is it possible to buy a retired Boeing 747 aircraft?

American airline companies landed their last passenger 747 jet into retirement last year citing higher costs of flying this aircraft in comparison to modern widebody twin-engine aircraft designed for ...
3
votes
1answer
61 views

TIS-B anonymous address

I could not understand what is the difference between ADS-R with anonymous address (CF=6, IMF=1) and TIS-B CF=5, which on ICAO Doc 9871 is described, for Version 1 as: Fine TIS-B Message AA field ...
10
votes
3answers
2k views

During single-engine taxi, how is the asymmetric power compensated for?

For various reasons (e.g. noise, fuel savings), some airlines allow single engine taxiing. Obviously, this produces an asymmetric thrust during the taxi. If the left engine is used, the aircraft ...
1
vote
0answers
28 views

What is the procedure for doing a symmetry check on a Cessna 172? [on hold]

I'm trying to find the steps to do a symmetry check of a Cessna 172. Or a form, or the section of the maintenance manual.
29
votes
3answers
7k views

Aircraft pilot's seats: what is the notch for?

If you do a Google or Bing search for "Aircraft Pilot Seat" then choose images, you might notice a large number, perhaps majority of them, have a notch cut out of the front of the seat. What is this ...
1
vote
2answers
144 views

Will the Boeing 737 MAX 8's software update require recertification of the aircraft?

Will the upcoming software update for the 737 MAX require the plane to go through a new certification like a new plane?
-7
votes
3answers
52 views

What happens to unstrapped passengers if the airliner were to fly inverted [on hold]

If for some reason or the other, because of an emergency, or perhaps craving jail time or did not want her job, or perhaps a girls will be girls moment, a pilot and her captain decided to fly a large ...
12
votes
2answers
330 views

How do I renew my ability to fly after 40 years?

I am 83 years old and it has been over forty years since I piloted an aircraft and would like to go back to flying again. I hold a single engine rating and had flown several hundred hours, but my log ...
12
votes
2answers
967 views

Is it possible and effective to perform a forward slip in a large commercial jet?

I'm wondering if it's possible to forward slip a large commercial aircraft, like the A320 or even B777, and if so: is effective or useful, since most small aircraft which I gather do it have no ...
0
votes
2answers
121 views

At what position or distance from an airport are you considered to be in the “traffic pattern”

image source In the United States, as an aircraft is approaching or departing a non-towered airport, at what position or distance from the airport are you considered to be in or out of the "traffic ...
1
vote
1answer
29 views

Airwothiness directives [on hold]

Does the owner of the aircraft have to do all the ad-applications to the aircraft? For example, even before the birth of the aircraft
2
votes
1answer
78 views

How to correctly interpret the taxi procedures in ICAO Doc 4444?

I have a question to ICAO Doc4444, Chapter 12.3.4.7, Taxi procedures for departure, c). My question is how to interpret the following, knowing that words in parentheses are mandatory, and words in ...
18
votes
5answers
3k views

Why was a Lockheed L-1011 chosen by Orbital ATK for its Pegasus launches?

Not sure whether this fits better here in Aviation, or would be better suited for Space, but since the question is about a terrestrial aircraft, I'll start it out here. The topic of my question is ...
3
votes
2answers
182 views

Do any propellers/propfans use stator vanes? Why is this not a commonplace feature?

I understand that axial-flow turbine engines generally include stator vanes behind every(?) compressor and turbine stage. This makes quite intuitively sense, because without them the rotating blades ...
2
votes
1answer
68 views

Why are hexa airfoils used on rockets despite having more drag that diamond airfoils? [on hold]

I was doing a study on airfoils shape for a rocket. I tested the diamond and the hexagonal airfoil with Missile DatCom, RasAero and the Shock Expansion theory and from my results it seems like the ...
6
votes
3answers
16k views

How can I calculate maximum rate of climb?

By what way and with which variables could you determine a plane's maximum rate of climb per time? If I'm not mistaken, I'm looking for VY.
29
votes
6answers
2k views

Why does Airbus not display the exact airspeed on the PFD?

On every other PFD (I know), the exact airspeed is displayed as big number on the PFD. To clarify what I mean, here are two pictures: Source, added square, Boeing PFD Source, added square, D10A EFIS ...
-1
votes
1answer
80 views

If the Meteor BVRAAM is the best AAM, and the APG-81 is the best radar for detecting aircraft, then why don't all fighter aircraft simply use these? [on hold]

Why are some missiles incompatible with some aircraft? If fighter A has better radar and missiles than fighter B, then why isn't it possible to simply integrate the better radar and missiles into ...
-1
votes
0answers
51 views

Are there commercial airplanes on which I can access the Internet from my mobile phone? [migrated]

I'm wondering if there are airlines that provide Internet access to passengers when flying longer (> 2 hours). And if it's technically possible at all.
4
votes
1answer
218 views

Is there a way for pilots to report difficulties and challenges experienced during a flight, to the next flight crew?

My question is reflected in the title - is there an official, international system for commercial pilots to report difficulties and challenges faced during a flight to the next and future crew? ...
5
votes
3answers
411 views

Are there left seat qualifications specific to actual handling of the aircraft?

The following three posts explain that both yokes and side-sticks require changing the hand that holds the yoke/side-stick when switching seats: Why are Airbus captain control sticks placed on the ...
0
votes
0answers
27 views

What kind of testing do new aircrafts go through in terms of avionics and software upgrades? [duplicate]

I am a UX designer, so my bread and butter is dealing with issues around software user research, information architecture and interaction design. I am very interested in avionics design but ...
1
vote
1answer
61 views

When extreme yoke movement cuts out stab trim on a 737-NG, does it stay off after yoke returns from limits?

I've read that the 737-NG has logic built into the stab trim system that will cause stab trim to cut out if the control column (yoke) is pulled/pushed far/hard enough (it's not clear to me if it's ...
2
votes
3answers
222 views

Is it possible to see the same sunset twice from an aircraft? [on hold]

If I initiate a climb just after watching the sun go down below the horizon, how fast would I have to climb in order to watch the sun come back up, so that I could then level off and watch the sunset ...
12
votes
2answers
672 views

Why is not every airplane equipped with 3 angle-of-attack sensors?

For critical systems, redundancy is built into the system. It is common knowledge among designers/architects to have three different inputs so in case one is faulty, input from the remaining two can ...
1
vote
0answers
36 views

How do composite aero structures compare against metallic structures in crash resistance?

is there any information available comparing the difference in crash resistance between composite mainly carbon or fiberglass polymers etc vs conventional metallic mainly aluminum aircraft structures.
0
votes
1answer
120 views

Is the in flight emergency manual of a Boeing 737 Max 8 available to read online? [on hold]

I frequently read about pilots going through manuals/checklists/procedures in an emergency situation in an airliner while in flight. Is there an online resource where the public can actually read it, ...
3
votes
2answers
146 views

I am 14 and want to be a pilot but don’t know how [duplicate]

Currently I am 14, turning 15 and live in Victoria. I have this aspiration to become a commercial pilot, but I don’t know how. Should I start flying now? Should I get a private pilot license by 16? ...
2
votes
3answers
198 views

Are there different symbols or graphics to identify different types of GA fuels?

Are there different symbols to identify the different types of fuels used for general aviation aircraft?
1
vote
0answers
43 views

Where can a UK citizen find a job with FAA CPL multi? [on hold]

So I’m from the United Kingdom, but I opted to do all my flight training within the US as I found it convenient there, now that I’ve finished all my training I’m totally confused on what I should do ...
3
votes
1answer
123 views

Is it safe to mix different types of fuels in a jet engine?

Hypothetically, if: one got stuck somewhere at a remote airport the jet aircraft or airliner they are flying had a 1/3 tank full of the proper jet A1 fuel there was a tanker at the airport with 1/3 ...
0
votes
1answer
62 views

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 ...
0
votes
0answers
22 views

Does the FAA have any special requirements for oxidizer tanks on rocket-powered aircraft?

There are quite a number of strict FAA requirements for aircraft fuel tanks (must withstand such-and-such many Gs from such-and-such directions, must be inerted, must be puncture-resistant, et cetera, ...
2
votes
0answers
94 views

How does the 737 MAX MCAS differ from stab trim in other 737 variants? [on hold]

I have the following questions: MCAS will not cut out from excessive control column movement as non-MAX 737 aircraft stab trim does. Is that correct, and is this cutout permanent or does it re-...
2
votes
1answer
59 views

Why would a C150 tachometer be sluggish?

After having an issue with a tachometer bouncing so much that it fell off, I now have the opposite problem with the replacement (Mitchell D1-112-5025): The tachometer is sluggish. When I open the ...
6
votes
1answer
4k views

How many AOA sensors does the 737 MAX have?

How many AOA sensors does the 737 MAX have? Given that it's reported in the media, that one faulty AOA probe activated the MCAS on the Lion Air flight, I was wondering if anybody also knows how an ...
-1
votes
1answer
284 views

737 Max Stall Disambiguation

I'm reading the article about the recent accident involving the 737 Max. https://www.seattletimes.com/business/boeing-aerospace/failed-certification-faa-missed-safety-issues-in-the-737-max-system-...
1
vote
4answers
285 views

ATC calling out regional airlines in traffic advisories: phonetic or “aircraft paint” airline used?

When ATC points out traffic that is a regional airline (e.g. Compass, Envoy, SkyWest, etc.), do they use the phonetic callsign of the airline, or do they use the callsign of the airline that they are ...
5
votes
2answers
125 views

How is smoke detected in the cabin when flying without passengers?

The Boeing website states that smoke detection devices are not present in the passenger cabin as the passengers/cabin crew are able to detect the smoke: A dedicated smoke detection system is not ...
-1
votes
4answers
605 views

Spinning wing heat dispersion dynamics for Mach 24 and beyond?

Could a spinning disk dropped from orbit survive speeds faster than conventional aircraft in our atmosphere? Does the rate of spin matter when dispersing heat? Does a spinning disk create stability ...
2
votes
3answers
99 views

How are V speeds spoken?

How are V speeds spoken? --Research for my novel. Is it the V and the number or letter notation or is there something more to it? The Wikipedia Page on V Speeds does not delve into the subject ...
12
votes
1answer
950 views

Why would FlightAware show this meandering flight path?

Today's BA219 from LHR to DEN (2018-03-20) appeared to fly 5 zigzags just before and over the Hudson Bay in Canada at around 18:15z. Prior to that, its flight path matched its planned route very ...
0
votes
2answers
115 views

How long are the nacelle strakes on a GE-90?

For my school project, I'm doing something where I create a nacelle strake on a model plane and I want to make it to scale. Could you please let me know the dimensions of a nacelle strake? I would ...
0
votes
1answer
74 views

Where can I find official definition of VFR and IFR? [duplicate]

I know that ICAO Annex 2 'Rules of the air' states rules such as general rules, visual flight rules, instrument flight rules, etc. And aircraft should fly in accordance with either visual flight rules ...
7
votes
1answer
116 views

What is scrub drag?

I've come across the term "scrub drag" in several papers recently, but can't find a detailed definition of this phenomenon. This is specifically in reference to aircraft and seems to apply to engine ...
0
votes
0answers
41 views

Question about career [on hold]

Good Day, I am support engineer and have had dream of becoming pilot but does not have much knowledge other that hearing that "you should not change your career!" Any help will be appreciated. ...

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