# All Questions

16,302 questions
Filter by
Sorted by
Tagged with
22 views

### “Snowglobe”-type attitude indicator [duplicate]

I'm an aviation enthusiast (I do not, or have never worked in the industry), but after researching several various emergencies (both in text and documentaries, and TV shows such as Air Crash Disaster/...
50 views

### Are thrust levers synchronized by default when pushed/pulled?

When I watched this video about the last flight of Juergen "J.R." Raps from SFO to FRA in an A380 (before his retirement) I noticed he lines up or synchronizes the four thrust levers as shown between ...
79 views

### Is an F-16 able to fire any of its weapons while on the ground? [duplicate]

I can recall at least one Hollywood movie, where this takes place (although not an F-16 in the movie). Is this at all possible? Can the F-16 fire its M61 while taxiing on the ground? What about other ...
137 views

### Can you feel passing through the sound barrier in an F-16?

Is it possible for the pilot to feel passing through the sound barrier in an F-16? What about other modern aircraft, will you feel anything? Do you need to go back to really dated designs before you ...
64 views

What are some advantages and disadvantages of Flaperons? Do they cause some issues or are they top-notch reliable?
69 views

### What is the difference between autopilot and autoflight?

Can you please give me some explanations about autopilot and autoflight system?
52 views

### Where can I place an engine in a twist morphing wing?

I am designing an electric aircraft with a wing that is completely based on the idea of biomimicry, whereas the wing has multiple winglets and can also morph by twisting. It is more like an experiment ...
51 views

### How did the Caproni Ca.60 electrical communication system work?

On the wikipedia page for the Ca.60 it says: The two nacelles also housed a cockpit for one flight engineer each, who controlled the power output of the engines in response to the orders given by ...
40 views

### shouldn't the upwash on an airfoil increase the effective angle of attack?

from what i understand, the induced drag comes from a reduction of the effective angle seen by the airfoil. however, from wind tunnel smoke visualization, we can see that the streamlines at the ...
26 views

### KJAC VORDME Rwy 19 Initial Approach Fix

See the attached KJAC VOR/DME Rwy 19 approach. QUESTION: Why is the JAC VOR an IAF for this approach? There isn't a procedure turn to use this VOR as a functional IAF, and the twin peaks (13,770' ...
161 views

### What DAL are Humans?

I am no expert at the Development Assurance Process, but hypothetically speaking what Design Assurance Level (DAL) would a human pilot receive if they were classified as one (i.e. DAL A, B, C, D, E). ...
76 views

### What date and time definition is used for the second leg of a flight?

Let's take flight BA0015, from London to Syndney, via Singapore. This is data from FlightStats. The first leg has this data: ...
65 views

### Has automatic all-seat reclining been tested?

Seat reclining in modern economy-class seats is a problem when person in front of you reclines, but you are still in vertical position. Has there been a consideration of simultaneous reclining of all ...
39 views

### What is the maximum stabilisatior deflection for the A320?

For research purposes I would like to know what the maximum deflection angles (in both positive and negative direction) of the stabilator and the elevator of the A320-200 are. I am trying to analyse,...
39 views

### When were checkerboard fiducial markers first used in aircraft development?

It's common to put checkerboard fiducial markers on aircraft to help analyze rates and orientations from photographs and film. When was this practice first used on aircraft? Flight test versions ...
2k views

### How does turbine efficiency compare with internal combustion engines if all the turbine power is converted to mechanical energy?

It is widely know that early turbojets guzzled fuel and created thrust simply by spewing accelerated matter out the back. Modern jets have come a long way in earning a better reputation with ...
86 views

### Do Airbus avionics give good deadstick landing outcomes? [on hold]

We have recently had a second good outcome, in Russia, of a no power landing of an Airbus aircraft. The first was the "miracle on the Hudson". It appears to me that the avionics of this aircraft are ...
33 views

### How do you design a NACA intake?

What are the construction guidelines to geometrically build a NACA intake (submerged intake) for aircraft. The relationships between the aerodynamic performance parameters (ram recovery, drag, and ...
31 views

### Are speed limits used for departure turns imposed also on the rest of the procedure?

ICAO's PANS-OPS manual 8168 ("Aircraft Operations") defines turing departures as described below: 2.4 Turning Departures. When a departure route requires a turn of more than 15°, it is called a ...
2k views

### Did the twin engined Lazair ultralight have a throttle for each engine?

Did the twin engined Lazair ultralight have a throttle for each engine? I know larger aircraft have dual throttles. What about the smaller aircraft like ultralights? It would be so much easier just ...
196 views

### What is the highest indicated airspeed ever achieved in a traditional aircraft?

It is fairly well known that the SR-71 holds the record for highest speed for a traditional aircraft (not a rocket/able to land and takeoff under its own power). However since the SR-71 flies much ...
973 views

### How do slats reduce stall speed?

I've read in PHAK that slats reduce stall speed, but in what way? Is it because of the increase in surface area?
90 views

### What would happen if you were to chain a helicopter down by the landing gear (or hard point on fuselage) and turn the throttle up? [on hold]

What would happen if you were to chain a helicopter down by the landing gear or fuselage and turn the throttle up? Would the effect be drastically different for larger or military vs civilian ...
124 views

### Subtypes of in-flight emergencies / Mayday calls; “red” emergency

I was reading the pilot's quote from the Northwest Airlines Flight 85 incident: https://en.wikipedia.org/wiki/Northwest_Airlines_Flight_85 "This was a classic application of CRM. We were blessed ...
49 views

### What sort of sensors are used for sensing the positions of the control surfaces for the ECAM F/CTL page on Airbus aircraft?

During the pre-flight flight-controls-check how does the ECAM F/CTL page report on the actual positions of the control surfaces? What sort of sensors are these? Is it a proximity sensor? This is ...
159 views

### Can military officers change occupation to become pilots?

From what I have read, the paths to become a fixed-wing pilot in the Air Force, Navy, and Marines, are to go to a military academy, enroll in ROTC in college, or go to an officer training school after ...
2k views

A sidestick is spring-loaded to the centre position. If there were servos under the stick, connected to the other side stick, so instead of being spring-loaded to centre, it was spring-loaded to the ...
91 views

### What is the function of cross bracing of interplane strut?

Pic 1 is the top and lower wing of a biplane called Bloop Ultralight,what is the function of the cross bracing between the interplane struts as seen in pic 1(I'm not talking about landing and flying ...
4k views

### Are there any legal requirements concerning airline pilots and their watches?

Are there any legal requirements concerning airline pilots and their watches? Do they have to be of any particular kind and are pilots required to wear one at all?
3k views

### What are these protruding elements from SU-27's tail?

I recently saw in person SU-27 belonging to the Ukrainian Air Force. I spotted some protruding elements from its tail and I'm wondering what are they called and what do they do?
102 views

### With an EASA PPL, can I invoice my mother's company for airplane rental to fly her to a convention, with no other renumeration?

My mother who owns a private company asked me if I could fly her to a convention. She asked if it was possible if the costs of the plane rental could be invoiced to her company. Since I only posses a ...
64 views

### How can I get 'lead point' for aircraft to intercept final course?

As controller, I always wonder when should I instruct aircraft to turn. The aircraft does not turn at right angles as soon as instructed, but rather has turning radius. So, I tried to find the formula ...
300 views

### Testing control surfaces pre flight; what feedback does pilot recieve?

During taxi / pre-take off I see a lot of commercial airliners test the deflections of their various control surfaces like the rudder, ailerons etc. What's the feedback received in this operation i....
43 views

### Can the back tail of an airplane move the center oft lift backwards?

I´m currently in the process of designing a prototype aircraft and since I don't have very much experience with this I have the following question: I know that the center of gravity of an airplane ...
309 views

### What happens to thrust and drag in a straight and level flight?

Straight and level flight means when an aircraft is flying at a constant speed without changing its attitude. Its lift is equal to the weight of the aircraft. It is flying at a constant altitude. Then ...
86 views

### Why are propeller driven aircraft commonly built with a higher wing aspect ratio and a straighter wing angle?

Why do propeller driven aircraft (especially smaller ones like fighters) tend to have a narrower wing with a higher aspect ratio and a more perpendicular wing angle in relation to the body, whereas ...
83 views

### Does the explanation of why slower airfoils are more efficient involve less energy loss from heating or compression of the working fluid?

We read time and time again, how more efficient slower airfoils such as helicopter rotors, props, and sailplane wings are compared with rapidly rotating fan blades or faster (still subsonic wings). ...
83 views

### How are sensors in the wheels connected to power and data buses?

In this question the sensors to measure the tyre pressure are described. But how do such sensors receive the electrical power they need, and how are the signal values transmitted back to the relevant ...
92 views

If you paid attention to NEXRAD training, you know that the colors of pixels show the maximum activity at any altitude in that air column. (It’s a “composite” view.) NEXRAD itself samples in three ...
56 views

### How much extra drag does an external HF antenna incur?

As seen in the picture, some older planes have external HF antennas that run from the fuselage to the tail. Have any studies found the wire to be a significant source of drag or is the difference ...
129 views

### What's This Cable Connecting Cockpit to Vertical Stabilizer in Air Tractor AT-401?

This is a picture of an AT-401 Sprayer Airplane I was wondering what's this steel-string stretching from cabin's windshield to the top of the vertical stabilizer ...
143 views

### On a bypass engine does the bypass air travel faster or slower than core air?

Using the convergent /divergent duct theory the low pressure cold stream bypass air would travel faster but I read on a web page that the bypass air travels much slower than core air. But again using ...
132 views

### What is this British bomber?

From previous answers this is probably at RAF Duxford in the mid-1930s.
32 views

### Non-dimensional variables choked nozzle

I understand that a choked nozzle removes the dependance on the static pressure $p_a$ because if M>1 in a choked nozzle then waves cannot travel upstream in the nozzle (as explained in the paragraph ...
110 views

### Why can some runways only be used from one end?

Is there any reason for why some runways can only be landed and taken off from one end and not the other, even though there aren't any obstructions (mountains, etc.) and apparently can be used from ...
105 views

### How does fuel efficiency depend on wing configuration?

Which of the following wing configurations is the most fuel-efficient?
104 views

### How are compressor blades connected to the shaft in turbojet engines?

The below figure is about rotor and stator blades of compressor . How these are connected to the compressor shaft in jet engines ?
20 views

### How to become a professional travel agent? [on hold]

In order to become a professional travel agent and set-up a travel agency, do you think it is mandatory to become IATA certified as first step? I am a newbie on this front, Could you please provide a ...