All Questions

2
votes
1answer
180 views

Can airlines choose whether or not to enable MCAS on their fleets, and if so, have US airlines chosen to do so?

I've been told that, although all 737 Max aircraft are equipped with MCAS, the system can be deactivated by the individual airline. I've also heard that US airlines never activated MCAS in their 737 ...
1
vote
3answers
175 views

Why does the U.S. have so many general-aviation aircraft?

In a comment on my previous question about the paucity of South Korean general-aviation aircraft in the 1990s, @Pondlife pointed out (in response to my comparison between the numbers of GA aircraft ...
0
votes
0answers
58 views

Can Med class 1 certificate be obtained with eyes like mine?

I'm wondering whether or not I'm able to obtain MED class 1 for aviation. I have went throught a laser surgery (FEMTO LASIK) and my vision is now clear and accurate with no complications. HOWEVER, ...
3
votes
1answer
96 views

Are there reference speeds like V1, Vr or V2 for a touch and go procedure?

Are there any reference speeds like V1, Vr and V2 on a touch and go procedure? During takeoff, these are used to mark certain states of the takeoff, including the speed at which the aircraft starts ...
3
votes
2answers
1k views

Did A320 NEO need an equivalent to 737 MAX MCAS because of its bigger engines?

We read that MCAS on the Boeing 737 MAX was needed because of the new, bigger, heavier engines of the MAX compared to the previous 737 versions. The closest equivalent to MCAS on the Airbus A320 NEO ...
35
votes
4answers
11k views

How do conventional missiles fly?

With the exception of cruise missiles, most missiles don't have any obvious lifting device. If you watch a missile being fired, prior to its rocket firing it does exactly what you'd expect: ...
5
votes
4answers
280 views

What are the advantages/disadvantages of in-fuselage engines (eg most fighter jets) vs wing/fuselage mounted engines?

Most modern jet fighter designs incorporate their engine(s) within the fuselage, while most other medium/large aircraft mount them either under the wings or on the rear fuselage. What are the ...
2
votes
0answers
13 views

Does a Navigation Specification characterize all legs of a terminal procedure?

I am studying the different parts of Instrument Flight Procedures, as they are described by FAA's manuals, such as the Aeronautical Information Manual, TERPS and Performance Based Navigation. For ...
0
votes
0answers
40 views

Berlin Tegel periodic runway direction switch [duplicate]

If you live in Berlin it's very easy to see airplanes approaching Tegel airport; sometimes you can see them approaching from East for a month and then suddenly approaching from West before switching ...
3
votes
1answer
45 views

Which Navigation Specifications support an RF leg?

I am studying FAA's rules concerning navigation specifications and the utilization of RF legs in an Instrument Flight Procedure. However, I am having trouble understanding if an RF leg is supported by ...
3
votes
2answers
165 views

Do modern aircraft automatically manage the deceleration to Vref?

Typically in most aircraft, the pilot manually reduces the speed gradually until reaching the landing zone/flare zone. Modern aircraft have FMC. Does the FMC automatically manage the speed gradually ...
2
votes
1answer
192 views

Why are tugs the least priority when talking to ground?

I was listening to this ATC conversation (3:10) and wondering: Why are tugs the least priority when talking to ground? I am thinking that some tugs might be towing aircraft that need to depart. Why ...
0
votes
0answers
30 views

135.293 if you do not complete your recurrent check by your grace month was the flying in the 13 month legal? [duplicate]

135.293 if you do not complete your recurrent check by your grace month was the flying in the 13 month legal?
0
votes
1answer
80 views

Airfoil- concave top and bottom [closed]

I remember building a radio controlled model in the early 90s with concave wing ribs/surfaces top and bottom...both sides of the wing were undercambered... It was a very great flying model...60" ...
1
vote
1answer
45 views

Current FMS with COMM tunning function capability?

I am currently more familiar with GARMIN 1000 systems than with the ones that are used nowadays in airliners. I know that you can tune a NAV aid from the FMC in an airliner. Actually, modern FMS ...
1
vote
0answers
49 views

Is there a relationship between 2D airfoil aerodynamic results and a revolution body from that airfoil?

The airfoil would be symmetric and the axis of revolution would be its chord line. Edit1: To clarify the question, suppose we have a NACA 0010. Then, using for example XFoil, I'm able to get, for ...
3
votes
1answer
180 views

On an A320, will the aircraft compensate for constant pilot rudder input?

As I understand from answers to the question What does rudder input control in normal law in an A320?: the rudder deflection is the result of the sum of pedals input and plane's FBW command in normal ...
-1
votes
2answers
202 views

What vintage aircraft was registered as NC7210?

Can anyone help identify this vintage aircraft, origin, and possible flight history. Airplane has this number of its wing, NC 7210.
8
votes
1answer
662 views

Are there more accidents in winter months, and if so, why?

I was watching The Flight Channel videos and have noticed that the accidents seem to happen more often in winter months (for the Northern Hemisphere). Are there some statistics to back this claim? It ...
-5
votes
0answers
68 views

I WANT TO BECAME A PILOT [duplicate]

I've finished form four last year in Tanzania, but my combinations PHYSICS,GEOGRAPHY and MATHEMATICS are not well balanced so as to JOIN ADVANCED LEVEL OF EDUCATION ,but I really likes to be a pilot[ ...
1
vote
0answers
99 views

Do airports archive the registration numbers of arriving and departing flights, and if so, for how long?

I am researching a flight I took as a child from LAX to Copenhagen in 1960 in a SAS DC-7C. I know the flight number, route, stops, departure time and date and wish to identify specifically which of ...
0
votes
0answers
90 views

Why were there so few general-aviation aircraft in South Korea in the late 1990s?

While reading the AAIB report on the crash of KAL 8509, I came across (in section 1.17.11, “Korean aviation statistics”) this surprising information regarding the South Korean aircraft population in ...
1
vote
1answer
173 views

What is this very isolated, modern aviation/heliport in Northwest Antelope Valley, California? [closed]

There's a modern facility at 118 53' 16" 34 9' 28" or about 9 miles north of Neenach, California. It has 5 hangars - 1 very large, 1 medium, 3 small - with other large buildings and a large water tank ...
15
votes
1answer
4k views

What are the unusually-enlarged wing sections on this P-38 Lightning?

Halfway through this video of the Lockheed P-38 Lightning, there's an unusual-looking example. Notice the enlarged wing sections outboard of the engine bodies, and also how the cockpit fairing ...
4
votes
1answer
177 views

What's the difference between setting auto brakes to MAX vs. RTO in Boeing Aircraft?

On Airbus aircraft, before taxiing and before take off, pilots turn auto brakes to MAX. But on Boeing aircraft, they will set auto brakes to RTO. Why does Boeing not use auto brakes MAX instead of ...
23
votes
3answers
6k views

Is it OK to decorate a log book cover?

I'm a student pilot and am thinking about putting a tasteful decal on my log book, if for no other reason than to identify it as my own. Is that OK, or would that be frowned upon? Thanks.
10
votes
1answer
3k views

Airplane gently rocking its wings during whole flight

I was on a flight with a regional airline a while ago in a Bombardier airplane (if I recall correctly) where the airplane would slowly and gently rock its wings just a little bit on the whole flight. ...
2
votes
3answers
227 views

Why would a flight take a detour on clean weather?

I was in a flight recently (march 22nd) from SBCF to SBGR (Brazil). It's usually a 1h10m flight, but mine took roughly 20 minutes more. I saw the flight path in FlightAware and there's an unexpected (...
0
votes
1answer
168 views

Could liquid alkali metal fuels be used for ramjet/scramjet propulsion?

In particular, I'm thinking about lithium, but sodium could be considered as well. Lithium has low molecular weight, very high propellant density, and low melting point. At sufficiently high ...
3
votes
0answers
134 views

Is the combustion process in turbofans and turboshafts different?

According to a journal paper, for a Gnome turboshaft engine, fuel-air equivalence ratio decreases as power output increases. However, for a CFM56 turbofan engine, the opposite trend is true, and ...
2
votes
1answer
368 views

What’s this vortex generator like thing below the wing?

In Barcelona’s El Prat Airport I saw some ceiling fans and noticed that they have on the lower part of the wings something that looks like a wingtip device or vortex generator. As far as I understand ...
3
votes
3answers
182 views

Do you need a rotating beacon if you have strobes?

If I were to replace my left nav light with a SkyBeacon ADS-B + strobe, could I remove the rotating beacon at the top of the tail?
2
votes
4answers
95 views

Aerodynamics of lift [duplicate]

How can lift on a canvas covered airplane wing in level cruising flight be explained without introducing Bernoulli ? Both upper and lower surfaces are bulged out,which indicates lower than ambient ...
3
votes
2answers
130 views

What factors made my flight land at runway 02 in El Prat?

Aircraft normally land at Barcelona's El Prat airport using either of the 25 runways, along a flight path hugging the coast, with a flip to the 07 orientation generally associated with bad weather. ...
2
votes
2answers
77 views

Can I use the load factor to estimate the lift?

If I have a fixed aircraft as the baseline, then I am not sure the specific flight condition, can I use the load factor to estimate the lift on the wing?
1
vote
0answers
62 views

Do cargo aircraft need an AOC?

Is it just commercial operating aircraft flying paying passengers that require an air operators certificate (AOC) or do cargo operators require one also?
4
votes
1answer
236 views

Why are piston-engined aircraft generally exempted from U.S. flight recorder requirements?

Most, if not all, of the FAA’s requirements for carriage of flight recorders do not apply to piston-engined aircraft. For instance, 14 CFR 91.609(c)(1) (emphasis added): No person may operate a U....
4
votes
2answers
127 views

Jet engine throttle-down time

Apparently airline jet engines lose ~80% of their thrust within 1 second after fuel is cut. However this seems to conflict with long throttle-down times noted in another question. This lead to a ...
8
votes
1answer
484 views

Why does the flight controls check come before arming the autobrake on the A320?

As per SOP on the A320 we first perform the flight controls check and then arm the autobrake to max. What is the reason behind this?
6
votes
4answers
1k views

If the updated MCAS software needs two AOA sensors, doesn't that introduce a new single point of failure?

Regarding the 737 MAX story, the New York Times writes: "Boeing’s software update would require the system to rely on two sensors, rather than just one, and would not be triggered if the ...
-1
votes
1answer
160 views

How do you disable plane AI when the plane goes crazy? [duplicate]

This came to my mind when I learned 737 MAX crash was caused by the AOA indicators giving faulty info to the AI which crashed the plane. So how do you completely disable the flight computer when it ...
7
votes
1answer
221 views

Why would the outer tanks fuel on the A320 be colder than the inner tanks?

I have noticed in a number of instances during long flights typically over 5 hours the fuel in the outer tanks on the A320 are colder than the fuel in the inner tanks. This goes against the system ...
2
votes
1answer
159 views

What is a lambda wing?

I was reading a description of the Boeing X-45 that described it as having "lambda wings." What is a lambda wing and why is it called that?
0
votes
0answers
30 views

Why do airlines change their flight numbers after a crash? [duplicate]

I was watching the flight channel on youtube and I saw that after the flydubai flight 981 was changed after they had a crash but the new flight followed the same flight path and destination only with ...
0
votes
1answer
45 views

Why are some dynamic derivatives not included in DATCOM file? [closed]

I am trying to understand Flight dynamics, particularly I am using Missile Datcom to get aerodynamic parameters of a missile, then use MATLAB, simulink to simulate its trajectory. It seems there are a ...
9
votes
1answer
2k views

What is “(CFMCC)” on an ILS approach chart?

I'm studying the ILS or LOC RWY 3 approach chart for KMKC. I'm trying to figure out what "(CMFCC)" at the runway means. Is it a computer navigation aid?
1
vote
0answers
108 views

Why do the in house Boeing 737 max tails have a drag chute? [duplicate]

In the recent videos of some in-house (tagged as Boeing instead of some airline), at the top of the aircraft's tail, there is a rope with a small drag chute attached to it. What is the purpose of this?...
4
votes
2answers
228 views

What does rudder input control in normal law in an A320?

I understand form documentation that in normal law, pedal input is not necessary to keep coordinated flight. It is merely said that using the pedals is not necessary. Later in the documentation it is ...
1
vote
3answers
92 views

How to apply the TO/GA time and EGT limits?

If there is a published 1) EGT limit and a 2) TO/GA time limit, which one should be applied when the EGT is well below the EGT limit and possibly even below the 'max continuous' EGT. Particularly with ...
3
votes
0answers
64 views

How are these flywheel-like devices used in the Boeing 737 Max? [duplicate]

The recent news video CNN's exclusive look inside a Boeing 737 Max simulator shows a 737 Max simulator cockpit. There are a pair of what look like large black flywheels on the console, shown spinning ...

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