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1answer
183 views

Lufthansa Pilots: Are you doing empty flights to keep slots?

It's not about judging LH or any other airline for doing this, I fully understand. I'm asking because I want to be sure not to have a bad opinion of E.U legislation before I have the facts. If you ...
0
votes
0answers
52 views

Suggestion to make a paper [closed]

I'm trying to make a paper for the master's degree, and my synodal are requesting me to propose an electronics applied to aviation/aeronautics to work on it. I have the idea of review if the 5g ...
2
votes
0answers
50 views

How do I find out if my aircraft satisfies a particular ICAO equipment/surveillance/PBN code?

I have a new, G1000-equipped C172S that just arrived, and I’m trying to figure out the specific ICAO equipment/surveillance/PBN/etc. codes for the aircraft. I’ve been trying to find out where to find ...
-4
votes
0answers
111 views

What is this gap underneath the vertical stabilizer? [closed]

Is this gap under the rudder of the vertical stabilizer normal on a 777? https://imgshare.io/image/r5vnX7
1
vote
1answer
95 views

Could the center of pressure be not on an aircraft?

I have created the outer mold line of a blended wing body drone and have put it through Ansys Fluent. Using SST k-omega turbulence model and 40 m/s of airspeed. However, the output from the program ...
2
votes
1answer
228 views

Why do twin-engine Diamond aircraft have a single FADEC lever instead of two engine throttles?

From my understanding, if you have a twin-engine aircraft with 2 lever engine throttle one for each engine you will be able to use differential thrust to steer in case of steering malfunction. I don't ...
1
vote
4answers
341 views
+500

A request to check old issues of the Airport/Facility Directory (1994-2001) -- when did this content first appear in the Legend?

When did language like NOTE: AIRSPACE SVC TIMES INCLUDE ALL ASSOCIATED ARRIVAL EXTENSIONS. Surface area arrival extensions for instrument approach procedures become part of the primary core surface ...
1
vote
1answer
138 views

What transponder code is assigned to Dream Chaser space-plane?

Dream Chaser is scheduled to start flying cargo missions to the space station in 2022. And, Sierra Nevada Corporation claimed it has the capability to land anywhere in the world.I have found it has a ...
-1
votes
0answers
22 views

Plot Turn Chart in CAS with acceleration performance [closed]

I want to plot Turn Chart and the ft-Ma chart for the pilots with CAS. I have given the data in TAS. For example my specific excess Power has the unit m/s At first i calculate the TAS into CAS. Can I ...
0
votes
2answers
66 views

How does the velocity of a turboprop engine relative to the airplane change when a plane is banking?

I saw this YouTube video recently: And in it, a turboprop engine propeller and gearbox comes out and slashes across the underbelly of the plane, crippling the aircraft....
1
vote
3answers
148 views

Why does power go up with the cube of the airspeed?

If i have an airplane with over 100 kN of thrust, and i want to accelerate from a velocity at which drag force is 25kN to a velocity twice higher, is it possible that i wont be able to do this because ...
1
vote
2answers
45 views

What's the relationship between mach number and drag force on an airplane?

From what i've read drag coefficient at mach 1 is several times (up to 10x) the drag coefficient below drag divergence mach number. It drops as the mach number increases. It's easy to find plots ...
0
votes
1answer
59 views

How to troubleshoot a noisy aircraft engine driven hydraulic pump? [closed]

I understand that engine driven hydraulic pump noise is caused by several reasons such as cavitation,aeration or mechanical defects but how to troubleshoot this problem using a flowchart from any ...
0
votes
3answers
91 views

Calculate Rudder Angle by Bank Angle [closed]

My question: Is rudder angle equal to bank angle? Or, does rudder angle has some relationship with ROT formula? Below is my steps trying to solve this question. Step 1: Found below graph from this ...
0
votes
0answers
68 views

Who is responsible for maintenance and eventual design changes for planes that the manufacturer has gone broke?

Sorry for the wrong vocabulary, I am not someone from the aviation industry. There was an incident (?) in a Foker 100 in Australia. Let's now imagine that there is some project change that has to be ...
4
votes
1answer
584 views

Who or what is the DEN and what do they do?

I was reading some older Av.SE pages and ended up on the ATC procedural document JO 7110.65 for handling emergencies. Down at the very bottom under 10.2.19(b) which has to do with medical/health ...
1
vote
0answers
92 views

Do the A320neo and similar aircraft use ring laser gyros or solid state MEMS gyros?

In new generation aircraft like A320 Neo or B737 MAX the IRS system which is present is it based on (Ring Laser or Fibre Optics) gyros or they used Solid state MEMS like which our present in our ...
3
votes
2answers
123 views

Does the FAA regulate FBOs?

One of our local airfields is a small D class, towered during the day, probably kept running at this status mostly because of historical/charity reasons. It gets 2 or 3 commercial flights a day and a ...
0
votes
0answers
45 views

What is the meaning of "Contra-Rotating Propeller Increases Efficiency"? How is it calculated?

This picture is taken from here. In that video is mentioned that contra-rotating propeller increases efficiency up to 6-16%. Regardless of the number that could be vary from one airplane to another, ...
1
vote
1answer
105 views

What is the reason behind updating the radar tracks on the CWP in chunks instead of updating them all at once?

Some time ago, I noticed that the controller's screen (CWP) of a particular system in a European ACC. was not updating all the visible tracks at once but it was following this pattern: The screen ...
3
votes
1answer
128 views

What exactly does "exercise extreme caution" mean when seeing alternating red and green light gun signals?

I've seen the light gun signals chart a hundred times but I don't quite understand when it says "use extreme caution" when you alternating green and red signals. What does that mean exactly? ...
9
votes
9answers
3k views

Novel Research: Best way to sabotage a Hawker Hurricane in 1940/41?

Essentially, one of the central events in my work-in-progress novel is the sabotage of a Hawker Hurricane in Malta by a member of groundcrew. I originally had this as him loosening an aileron so that ...
1
vote
2answers
99 views

Where is it defined (in UK law ideally) when a glider is in flight during what period, start and stop?

This seems to be a standard question but at least two of us should know, cannot find a definitive source, CAP393 seems not to have any text that refers. Any help gratefully received.
22
votes
5answers
4k views

Would building a large asphalt square or painted dark black area create a "thermal generator" for glider use?

Imagine if you build a "parking lot" square of asphalt and paint it the deepest black possible to absorb maximum heat...would that spot essentially be a thermal generator that you could fly ...
3
votes
0answers
71 views

Why do DVORs and CVORs rotate in different directions?

I am currently studying both systems and I have the following doubt: why does DVOR rotate counterclockwise as opossed to CVOR? Could it be because the reference and variable signal are "swapped&...
3
votes
1answer
174 views

What is the difference between a tear strap and a doubler?

Is there a difference between a tear strap and a doubler? If I get it right, the tear strap reinforce the main structure locally and prevent the propagation of tears, while the doubler, well, it has ...
20
votes
6answers
6k views

Why are Li-ion batteries not being used in aircraft but are widely used in electric vehicle industry?

This might seem a very naïve question. Maybe the comparison of electric vehicle to aircraft is hugely inappropriate. But I couldn't find a clear answer in web search. Lithium-ion batteries have a high ...
3
votes
2answers
132 views

Inspection panels and meaning of "free" in pre-flight check list

In the flight manual (DA-20) in the wing section it is written: “Aileron including inspection panel - visual inspection”. What does the “including inspection panel” part mean? Also, during In-Cabin ...
0
votes
1answer
60 views

What is the windshield Heating Element (Thin Cable) for Aircraft or Rotorcraft?

My question is related with the heated windshield employing the some type of heating elements. Very very thin metalic cables are in use between two glasses of windshield. I have searched but noting ...
0
votes
1answer
64 views

Package Substation below the VORTAC Counterpoise [closed]

Is it recommended to install a 100 KVA 13,800/400 Volts, 3 Phase, 60 Hertz Package Substation beneath the VORTAC Counterpoise Metallic Grids and what will be the effects if the substation is already ...
11
votes
4answers
2k views

Does "Cross [FIX] at 250 knots" mean I have to maintain 250 knots after the fix?

If you are given the clearance to "cross [FIX] at 250 knots", does this specifically mean : 1 ) Cross fix at 250 knots, and then after [FIX] your assigned speed is 250 knots until otherwise ...
2
votes
1answer
61 views

How are practice areas communicated?

When I fly near my local airport (KSSF) in San Antonio, there's a designated South Practice Area and North Practice Area. ATC knows where they are and all the ...
5
votes
1answer
1k views

Why not use the alternate static port at all times?

One of my club's small planes apparently has an intermittent problem with moisture in the static port line, so the recommendation is to always fly with the alternate static port open. That leads me to ...
0
votes
3answers
135 views

Calculate speed by turn angle and distance [closed]

I'm trying to combine two rate of turn formulas, which I found it online this and this. The first is ROT = 1091 * tan(bank angle) / speed in knots The second is <...
1
vote
1answer
82 views

How to maximize lift for a given span or, more generally, width of airplane?

This weekend I saw the Fly Baby at the Smithsonian Air & Space Museum at the Washington Dulles Airport, and it was at some point the smallest airplane (since surpassed by the Bumble Bee II, if I ...
4
votes
3answers
672 views

Can prop wash from a live engine contribute a sideways force on the aircraft?

A recent response to this question, it was posited in the accepted answer that: the rudder "also creates a side force" (as well as a torque) that is countered by banking the aircraft, ...
7
votes
1answer
290 views

What is the difference between Vs and Vs1g?

As the name suggests, what is the difference between Vs1g and Vs? If both of them are referring to the stall condition, why they aren't the same? Which one is usually greater and why? Why do we need a ...
0
votes
1answer
163 views

What are the basic principles of making fighter jets manoeuvrable [closed]

Disregardimg thrust vectoring and other computer-aided functions, what are all the basic factors of making a fighter jet manoeuvrable? Using basic physics design principles such as high thrust to ...
0
votes
1answer
102 views

Where can I find a description of the ECAM system pages?

I'm studying up on the display formats of the System Display (SD) in a typical ECAM. Articles online have stated that it is capable of showing 12 different system pages with different info. However, I ...
2
votes
1answer
116 views

Why is maximum zero fuel mass used in take off mass calculation?

In calculation we consider maximum takeoff weight , maximum landing weight and maximum zero fuel weight we selected the lowest of below mentioned Maximum Zero fuel weight + Take off fuel Regulated ...
0
votes
0answers
45 views

Must aviation rental services company do 100-hr inspections? [duplicate]

We rent our airplane to only certificated, rated pilots. These pilots may rent to increase their XC flight time. They may rent to take a family member sightseeing. In some cases they may rent our ...
1
vote
0answers
94 views

What is the correct cruise operating temperature for the PT6A-60 in a King Air 350?

Why are King Air 350 PT6 operating temps the way they are? I’ve been taught to cruse at 785 as per Beech/Textron maintenance recommendations. My non typed not really qualified FO claims I am ruining ...
-3
votes
2answers
208 views

If Navier-Stokes equations are unsolvable how does CFD software calculate simulation? [closed]

Navier-Stokes equations are one of the problems of the millennium. How, then, are CFD programs doing simulation, calculating forces, etc if these equations are unsolvable?
7
votes
3answers
3k views

Unclear about how you can have high RPM but no power

I did see this question: Manifold pressure vs power vs rpm But I'm still a bit unclear about the following. I've only flown cherokee pa28s, so I might not have empirical knowledge of the following. I ...
5
votes
4answers
553 views

Why does lift decrease and drag increase when approaching the stall condition?

This is an ECQB-PPL question specifically asking what happens before the stall. I do understand that after the critical angle has been reached, the airfoil is no longer generating lift (so obviously ...
0
votes
0answers
42 views

What components does AC bus1, AC bus2, AC EssBus, DC bus1, DC bus2 & DC EssBus supply to in A320?

Under chapter 24 (electrical) of Technical training manual downloaded from this website ( https://vdocuments.mx/reader/full/a320-chapter-24-electrical-power ), What components does all the buses ...
2
votes
0answers
74 views

How is a new airport certified or approved to operate by international organizations?

I just read the news of a new airport in construction in Mexico (Mexico City). They seem to be starting operations in a few months. In this case, researching a bit, it seems domestic and a Venezuelan ...
4
votes
1answer
173 views

Can a jet-engine aircraft fly all the way to its service ceiling at its maximum takeoff weight? [closed]

I am trying to understand how high an aircraft can get to at its maximum takeoff weight (minus whatever fuel is consumed in getting to that altitude). Can it make it all the way to its service ceiling?...
2
votes
2answers
162 views

How did the waypoint ULURU get its name?

Can anyone explain how the waypoint ULURU near Sandspit, BC Latitude 53° 6' 1.00" N Longitude 131° 38' 13.00" W was named, when Uluru is a very large monolith in Australia also known as ...
1
vote
2answers
266 views

Is aerodynamics science still being discoverd? [closed]

Is aerodynamics science still being discovered(like mathematics for example) or everything has already done?

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