All Questions
24,970
questions
-4
votes
3
answers
311
views
Could a trained individual passenger escape a commercial plane crash by bringing the necessary equipment to parachute?
We've been through why airlines don't provide parachutes for the passengers. But who says they have to be provided? I want to take my fate into my own hands the next time I fly, by bringing my own ...
- 231
0
votes
1
answer
150
views
How does speed and angle of attack affect pressure distribution at the wingtip?
So I was wondering how speed and AoA affect lift distribution at the tip of a wing. For example, if you are flying level and at a high speed, does that mean your wing has more even lift distribution ...
- 435
0
votes
1
answer
161
views
Can you augment turbofan thrust using steam injected into the bypass?
Would using waste heat from the core exhaust to turn water into steam increase takeoff thrust when injected into the bypass before/aft of the fan?
If so, which would be better?
Could this possibly ...
4
votes
2
answers
2k
views
Is "Aviate, Navigate, Communicate" legal in Part 121 operations?
14 CFR § 121.557(c) says in part, (emphasis added)
Whenever a pilot in command... exercises emergency authority, he shall keep the appropriate ATC facility and dispatch centers fully informed of the ...
- 6,564
2
votes
0
answers
46
views
ADS-B for satellite Tx in Canada
Can simple rod transponder antennas be used to satisfy the Canadian requirements for a top antenna to communicate with ADS-B satellites? (eg. RAMI AV-22)
- 21
2
votes
1
answer
322
views
Why 737 NG Flight Director need to be Recycled?
When FD switch is on, FD is on.
When FD switch is off, FD is off.
But when FD switches are recycled, FD switch on, but FD bars are not shown during approach. Is this due to approach FD logic? If so, ...
- 145
0
votes
1
answer
75
views
Why are these characteristics of the FT-180 highlighted?
I have been checking the FT-180 engine used to establish speed record for remotely controlled aircraft (i.e. model airplanes). There are some specific features highlighted on the manufacturer site. I'...
- 283
0
votes
0
answers
46
views
Use twist to improve stall characteristics in ideal distribution of lift coefficient
Is practical use twist (geometric or multiple airfoils to improve stall characteristics) when it has lift coefficient distribution ideal or near due to wing plataform?
I am analyzing a "Schuemann&...
- 113
4
votes
1
answer
711
views
What type of plane/model is this twin-engine plane?
I would like to know what type/model is this plane, because I like it a lot.
- 49
8
votes
2
answers
1k
views
Mandatory Reports to ATC on an Approach
An instructor recently told me a required radio call to ATC is to tell them when you are established on course on final approach. His point was that this tells ATC when to switch you to tower. While I ...
- 886
1
vote
2
answers
225
views
Can I share ACARS messages online?
ACARS messages are transmitted via radio just like normal ATC communications are. In the UK, for example, it is illegal to listen to and broadcast ATC chatter. Does the same apply to ACARS? If an ...
- 453
0
votes
0
answers
64
views
Holding Airspeed at Military Fields
I read in the AIM, 5-3-8 j.2.b.3 that holding airspeeds at USAF airfields only are 310 KIAS maximum, unless otherwise depicted. I interpreted this to mean that any holding pattern on an approach plate ...
- 886
2
votes
3
answers
149
views
Cruise-climb in glider with electric motor?
I have been looking for the definition of cruise-climb for gliders that use an electric motor, but so far I have only been able to find a definition based on liquid fuel. I'm asking because that ...
- 113
2
votes
4
answers
194
views
Moving from 2D wing to 3D wing design
In terms of the design perspective of an Aircraft, once we decide on the airfoil that would be used for the wing, how would an Aerodynamics Engineer (or you) proceed to construct the wing? The ...
- 21
0
votes
1
answer
63
views
Sources for Python Codes to do some aerodynamic Calculations [closed]
I am currently working to design a wing. I basically want the Python code which would take the coordinates of the airfoil (.dat file), freestream velocity, Span (b), planform of the wing as input, and ...
- 21
4
votes
1
answer
167
views
What are these two sticks on chart holders?
Many different airplanes feature two small sticks on both sides of chart holders. These can be moved within a limited range. I've heard different versions about their use and haven't found any ...
- 447
9
votes
2
answers
4k
views
Six Propeller Engine Military-Type Aircraft at KPHX Sky Harbor
I was browsing the Google Maps 2023 image of the now-demolished Terminal 2 at Sky Harbor in Phoenix, Arizona. (See below.) I noted what appears to be a six-engine military transport aircraft parked ...
- 91
0
votes
0
answers
61
views
Is there an equation to solve for bank angle using load factor and wing loading as variables? If so, what is it?
The problem is that I'm looking for both wing loading and load factor as variables to solve for bank angle and cannot find any equation that represents this. After searching various websites and not ...
- 13
1
vote
1
answer
85
views
What's the more accepted notation used to label sensors present in turbo-jet engines?
I'm interested in learning what the proper (more accepted) notation used to label sensors present in turbo-jet engines is.
Came across a few examples such the ones shown below but would like to learn ...
- 113
0
votes
1
answer
139
views
Hire a Pilot & Rent a plane or need to purchase
I am interested in buying a plane and hiring a pilot on an as needed basis for flights. Is that possible?
Before making the decision to purchase, is it possible to rent a plane and separately hire a ...
- 1
7
votes
2
answers
2k
views
What does "NON-COMPLIANCE WITH FAR 157" mean for an airport?
I was looking up the airport in Gorham, New Hampshire (2G8) on SkyVector and noticed it had a line that said "NON-COMPLIANCE WITH FAR 157". I know FAR 157 concerns what is needed to build, ...
- 433
0
votes
1
answer
91
views
Trailing edge tapered and leading edge straight
It is true that a wing with a straight leading edge and a tapered trailing edge has good stall characteristics?. That is, we can assure that when it enters stall, it will first be at the root and then ...
- 113
6
votes
2
answers
482
views
Why don't modern military aircraft typically keep their guns covered?
Back in the 1940s, it was common to cover gun ports with tape. As well as improving streamlining, it would presumably help keep them clean.
Spitfire Mk 1, with all eight .303 inch Browning machine ...
- 11.8k
0
votes
2
answers
153
views
Why do I keep getting different results to an aircraft's turn radius when I plug variables into different calculators and solve on my own?
I'm trying to solve for an aircraft's turn radius at mach 3.17 (2432 mph) and a bank angle of 19.8; however, after using various online calculators and personally solving the equation, I keep getting ...
- 13
18
votes
6
answers
7k
views
Is needing to urinate an emergency?
I'm planning a 3.5 hour trip. Usually I urinate more frequently than that, but I will not drink many fluids the morning of the flight in an attempt to get to my destination directly.
If a pilot or ...
- 12.5k
0
votes
2
answers
100
views
Pilot briefing strip
Hello can you guys break this down for me?
The briefing strip says
Rwy 10 R helicopter visibility reduction below RVR 4000 NA. Is NA not authorized or Not available?
Simultaneous approach authorized .
...
- 889
2
votes
2
answers
199
views
Do winglets change the lift distribution of a wing?
In this answer, it claims that the reason for lift decreasing at the wingtips is due to airflow around the wingtips. If I'm thinking correctly, that is due to the air below the wing spilling on to the ...
- 435
11
votes
3
answers
3k
views
Is there a tailwind limit while in cruise?
The storm Ciarán is, as of posting, making its way through the Atlantic Ocean with winds easily passing 300 km/h (161 kts).
While this is going on, a BA flight took only 8 h 45 mins to do LAS-LHR with ...
0
votes
3
answers
64
views
How does changes in Power vary the aerodynamic forces on an aircraft?
When we make changes to the Thrust by adding or removing power. In what way does it affect the other forces? As Power controls Rate of Climb or Descent of an aircraft, How is it acting on the other ...
- 609
5
votes
0
answers
162
views
Why For A320, On ground, reopening of the pack valve is delayed for 30-60 seconds
I've read in FCOM that, during engine start reopening of the pack flow valve is delayed for 30-60 s to allow second engine start? But isn't it that the pack flow remains closed only for the side the ...
- 689
0
votes
1
answer
145
views
Is inverted aerial refeuling possible?
Google found lots of information about how to air-to-air refuel an inverted plane inside a video game. Is it possible in reality?
- 2,410
0
votes
0
answers
64
views
pressure wave propagation of shockwaves? [duplicate]
I can’t find a simple explanation of how the pressure waves propagate that leads to a shock over an aerofoil online.
How does this happen with upstream flow that is high speed but subsonic?
- 87
2
votes
1
answer
115
views
In what situations can LNAV/VNAV minima be higher than LNAV minima, such as RNP Approach to Runway 16 in Corfu?
I recently flew the RNP approach for runway 16 into Corfu. While reviewing the approach charts, I noticed something unusual. The LNAV/VNAV minima is set higher than the LNAV minima for this particular ...
- 1,802
2
votes
1
answer
99
views
How does a shockwave form from a subsonic upstream?
How does a shockwave form over say an aerofoil from a subsonic upstream?
Wouldn’t the flow have to be supersonic before it ‘shocks’?
Also, does the flow in a shockwave jump from let’s say it is at M=1....
- 87
2
votes
5
answers
258
views
Can an airplane propeller become supersonic?
Is it possible for an aircraft propeller to become supersonic?
I am not referring as for the aircraft, only the rotating blade.
I know it is extremely unlikely for a propeller plane to go supersonic, ...
- 21
3
votes
1
answer
140
views
Effect of wing flexible in stall
How true is it that the deflection (due to large aspect ratio, flexible wing ) of a wing has a certain effect on the stall characteristics? I read about this in the case of large wingspan gliders. ...
- 113
33
votes
1
answer
4k
views
How does jet fuel not spill out upon disconnecting from the wing's intake?
I was watching a refuel yesterday and I was wondering: what type of mechanism is in place, so that when the fuel hose is disconnected, no fuel spills out? (wondering since the hose is pointing upwards ...
- 433
2
votes
2
answers
717
views
Medical requirements for becoming a Pilot
I’m currently a junior in high school and I would love to pursue being a comercial pilot as a career.
The thing is I have a medical condition called EoE. It’s basically when I eat something I’m ...
- 21
2
votes
2
answers
153
views
Why does Vx increase with altitude and Vy decrease?
As an airplane climbs, the best angle of climb airspeed (Vx) increases and the best rate of climb airspeed (Vy) decreases.
I can't figure it out, why does it happen?
I Hope someone explains it to me
I ...
- 23
9
votes
3
answers
3k
views
What is the best way to deal with a stuck throttle?
Recently I watched a fascinating video of Cathay flight 780.
What interested me about the end of this incident is that the pilots opted to land the aircraft with the engine 1 still at 80%, over ...
- 12.5k
1
vote
1
answer
110
views
Air pressure in cold air vs warm air
I’m a little confused here . Studying for ppl exam it is stated that cold air is at higher pressure than warm air rising up, so the flow is from cold to warm. But then again , when flying from warm ...
- 13
11
votes
3
answers
3k
views
With existing tech and knowledge of meteorology, can aircraft be designed to reliably improve their range or loiter using updrafts to gain altitude?
Just what the question says. I want to know if aircrafts' range, loiter time, or other measures of merit can be dramatically and reliably increased using our current understanding of meteorology and ...
- 113
5
votes
3
answers
2k
views
What are the design disadvantages of a monowheel landing gear setup which might have led to its historic rejection?
Monowheels have a lot to be said for them, which is why we use them in gliders. They save weight, drag, and cost, are tolerant of tire failures, and frequently handle outlandings with aplomb.
However, ...
- 4,893
2
votes
2
answers
697
views
Finding longitude/latitude of a aircraft
I have been scratching my head for a long time on this one so any help is apperciated. How would I find longitude and latitude points of a UAV given this:
True Airspeed
Roll rate, pitch rate, and yaw ...
- 21
1
vote
2
answers
235
views
How does aspect ratio affect stall speed and stall AoA?
I've read a few answers on here but they didn't really tell me what I wanted to know. So I get that high AR wings will stall before low AR wings but what makes that true? Higher AR wings have a higher ...
- 435
0
votes
4
answers
336
views
What format is the output from a GA aircraft microphone? WAV? MP3? or some other format
I'm trying to develop a personal weather station observation to a voice output on Unicom when pilot activated.
To start, I need to know what format is in the output from a GA aircraft microphone? WAV?...
- 17
1
vote
1
answer
111
views
Question about ILS approach categories
I was reading about FAAs ILS approach categories minimums and have a question!
Category II. DH 100 feet and RVR 1,200 feet (with autoland or HUD to touchdown and noted on authorization, RVR 1,000 feet)...
- 151
2
votes
2
answers
249
views
What airplane needs the longest runway to land?
What airplane (excluding spaceplanes) requires the longest runway for a safe landing?
- 6,564
6
votes
1
answer
745
views
Is this Common carriage?
It’s been a little while since I’ve studied common carriage vs private carriage.. I need a little advice with this situation. My dad is purchasing a plane (in his name and company) and I’m going to ...
- 117
-1
votes
2
answers
329
views
What department does an airline pilot fall under?
On LinkedIn, I saw on the Page for the Harry Reid International Airport there were charts for 346 members, 157 of them working in Operations, 43 for Administrative, 37 for Business Development, 25 for ...