# All Questions

15,715 questions
18 views

On Sunday, I was on a flight in Greece, on a A320. I was sat just forward of the wings. Someone sat in the isle seat opposite me, asked if she could move to the back to sit with her friend, since the ...
14 views

### Why would an aircraft drastically reduce in speed and then accelerate during landing?

I was on a flight today and I noticed that as we were approaching to land, the plane drastically reduced its speed for few seconds and then regained its speed. Can somebody tell me why?
14 views

### LDM Message to SQL server [on hold]

is there a solution to save the content of an LDM message to my SQL DB I am trying to build an application that can read LDM Msg and store it into my SQL server for making statices
12 views

### What is the difference between VFR Flyways, Corridors and Transition Routes?

What is the difference between: VFR Flyways VFR Corridors VFR Transition Routes I can find a Flyway chart on the reverse side of the TAC chart and also Transition Routes in the TAC chart. But where ...
45 views

### What happens to Cessna electric flaps that are moving when power is lost?

On final in a C182T you move the flap control arm from 20 to FULL, and when halfway there, the breaker pops (or BUS1 fails, a wire falls off, etc.) Does the flap stay where it is, slide back to 20°, ...
100 views

### When do wings not matter?

At what speed or altitude does a plane become a rocket? There are rocket powered planes but when does thrust vectoring replace the wing?
80 views

### Can ADS-B used for voice communications?

Everyone knows the radio communications doesnt sound great altough they work perfectly. But can the brand new ADS-B communications be used for carrying audio signal? Would it be clearer? The ADS-B ...
49 views

### How to properly activate a flight plan

Ok, so you have a flight plan filed (over internet, phone, company or however), go to the aircraft and get in the cockpit. So you call the controller and request IFR or VFR as appropriate. What is ...
60 views

### What kind of microphones does aviation use?

Do they use the dynamic ones or cheap ribbon ones? Also why are these microphones so small? I guess they dont use condensers. (I am yet to see an 3.5mm jack (which is used both on the C172 and the ...
176 views

### Causes of High CHTs

I have a Long EZ with a Lycoming O-320 E2D. It had a complete top-end overhaul two years ago, in June 2017. All four cylinders were relined, and pistons and rings were replaced. Since then the ...
138 views

### Can Python be used onboard systems on aircraft or military jets? [on hold]

Was working on a python related to avionics, came across a serious doubt whether code written in python would compile or run on a real time OS used in on board systems.
2k views

### How can lift be less than thrust that is less than weight?

Physics in schools teaches two contradictory and mutually exclusive things: That the upward lift force on an airplane in flight equal its weight (Lift = Weight = Mass x Gravity). This is based on ...
97 views

### May turn rate indicators (and turn coordinators) be calibrated to be accurate at all airspeeds, or only for one?

2 related questions: may a turn rate indicator be calibrated to be accurate at all airspeeds, or only for one? Likewise for a turn "coordinator". The meaning of "accurate" intended in this question ...
67 views

### How are crews managed after a diversion (far from hub)?

While reading one of the reports of flight diversion, I started thinking about how airlines manage aftermath of the diversion especially for long haul transatlantic flights. Many of the reports say ...
55 views

### What is the FAA regulation for the 3 mile / 1,000' separation for a commercial airliner? [duplicate]

I need help finding the Number/Citation for the FAA regulation/order that states commercial airliner separation should usually be at least 3 miles laterally, or 1,000 feet vertically. I cannot find ...
119 views

### How are electronic instruments and other equipment powered in a glider?

Radios and other electronic devices must be battery-powered. What sort of battery - and does its capacity impose a limit on flight duration, or can they be recharged in flight with a turbine?
239 views

### Why did this aircraft take off in the opposite direction compared to the one used by other flights right before/after it?

I recently took a weekend trip to Naples and went to admire the city from above at the Certosa di San Martino panoramic viewpoint which, it turned out, was also offering a distant view at NAP ...
137 views

### What is the formula for the bank angle required for a turn in line-abreast formation?

Imagine we have a line-abreast formation of aircraft, with differing airspeeds, turning around a central pivot point, like points on the radius of a phonograph record, with an equal amount time per ...
62 views

### How to know which data came from Mode S and which came from ADS-B (FIS-B)?

I'm dealing with recorded ADS-B data as a part of my thesis (programming-oriented). I have a table of ADS-B communication of an aircraft (image below) - I know, that some of these recorded data in ...
107 views

### Does pumping fuel to each wingtip affect roll trim in a stabilized turn?

If an aircraft is stabilized in a constant-bank, constant rate turn with no sideslip, and then we pump 200 gallons of fuel from a fuselage tank to a tank on the tip of each wing, without changing the ...
4k views

### How long did the SR-71 take to get to cruising altitude?

How long did it take for the SR-71 to go from taking off to 80,000 ft, including refueling?
5k views

### Has a life raft ever been successfully deployed on a modern commercial flight?

Has a life rift ever been successfully deployed in the event of an air accident involving a commercial aircraft? For the purposes of this question a "life raft" is an inflatable device designed ...
111 views

### Has a life raft ever been successfully deployed in case of an accident? [on hold]

Has a life rift ever been successfully deployed in the event of an air accident? By successfully I mean removed from the aircraft, placed on the water, inflated and used by passengers/crew as a life ...
108 views

### What do pilots like to avoid during cruise flight? [on hold]

I had the opportunity to talk to a pilot once and he told me that during the cruise phase of a flight he likes to avoid the following things: Turbulence to increase comfort of the passengers ...
3k views

### How do internally carried IR missiles acquire a lock?

On aircraft that carry their IR missiles on external stores, like the F/A-18, an IR-missile acquires a lock by having its seeker being directed to the target heat source by whatever means and the ...
126 views

### Do strike aircraft turn off their datalink?

As far as I know, it is normal procedure for aircraft on a strike mission to go into radio silence at a certain point of the mission, as to not give of any unnecessary emissions that could warn the ...
44 views

### How does the B-2 Spirit fly without a rudder? [duplicate]

On the B-2 Spirit bomber there are no rudders on the back of the aircraft, how does it fly without entering a flat spin or losing control, because when other aircraft like commercial liners lose their ...
87 views

### Difference between engine rev up and run-up

Explain please the difference between these jet engine terms: rev up run up Obviously they are completely different procedures. The reason I ask this question is because I'm not a native speaker ...
170 views

219 views

### B777- In emergency mechanical back up how does the flight controls manage engine failure

In case of engine failure above the ocean with multiple electrical failures and after having exhausted the batteries the fly by wire mechanical backup with available hydraulics if left with the THS ...
125 views

### Does the DC-3 passenger airliner have slats?

The DC-3 is a very popular and widely used aircraft, yet has low speed tip stalling risks due to the design of its wing, which at the time of its development represented the leading edge in drag ...
3k views

### What is that ceiling compartment of a Boeing 737?

Does somebody know what that big box in the roof of the 737 cabin is?
55 views

### after how many hours does a geared turbo fan require an oil change [on hold]

after how many hours of use does a geared turbo fan gearbox require an oil change and does it use use regular gearbox oil used in cars and trucks?
2k views

### What is this airplane that sits in front of Barringer High School in Newark, NJ?

This airplane sits in front of Barringer High School in Newark,Nj. No one there can identify it. Anyone have any idea of the make and model? Thanks
229 views

### How come Boeing invested \$32 billion on the 787 program and Airbus only \$15 billion on the A350?

How come Boeing invested \$32 billion on the 787 program and Airbus only \$15 billion on the A350? (according to wikipedia)
139 views

### Why is the intake of the 757 (RR) engine slanted? [duplicate]

I'm sitting looking at a 757 with Rolls-Royce engines and just noticed that the intake is slanted forward by 5-10 degrees. Anyone know why? (wikimedia.org)
60 views

### Helicopter tail horizontal stabilizer angle

In helicopters what factors decide the horizontal tail stabilizer angle? By angle I mean that in some helicopter they are -6 deg relative to tail boom while in some -3 deg. These angle were remain ...
154 views

### Is the transition altitude around Denali still 18 kft AMSL, and, if so, how is this handled?

In North America, the transition altitude - the altitude below which everyone reports their altitude in feet above mean sea level (AMSL) and sets their altimeter to whatever the weather dictates that ...
132 views

### How are military aircraft directed to targets?

How would a controller, say, AWACS or ground radar, direct via voice an aircraft to the location of an airborne target? I've seen it in movies, but don't know if they where right, nor did I ...
24 views

### What are typical naca foils for winglets for ultralights/LSA?

What are typical naca foils for winglets for ultralights?
51 views

### What is the difference between 'warning area' and 'ADIZ'? Are they overlapped with each other?

On FAR AIM, definition of warning area is Airspace of defined dimensions, extending from three nautical miles outward from the coast of the U.S, that contains activity that may be hazardous ...
74 views

### How should a newly minted instructor sign an endorsement?

A newly issued flight instructor certificate often has the word "PENDING" in the certificate number field. In 8900.1 Flight Standards, Volume 5, Section 1, Section 5, Paragraph 5-112(c)(2)(a) ...
166 views

### Why only the outboard (“low speed”) aileron drops when there is no hydraulic pressure on the 747-8?

As the title says, why only the outboard ("low speed") aileron drops when there is no hydraulic pressure on the 748? (Full resolution)
37 views

### What is the effect of aileron deflection on the centre of pressure?

Deflecting an aileron will increase or decrease the camber of the outer wing where the aileron is attached. I learnt on this platform that centre of pressure (c.p.) moves fore and aft with aileron ...
189 views

### What is a “KALP114A” ATC regulation?

My flight (in Spain) was delayed for 6h and after I submitted the claim the airline worker answered me that it was delayed due to KALP114A regulations imposed by ATC, but I didn't find any info, that ...
50 views

### Can a Captain also fly from the right-hand seat? [duplicate]

Can a captain that just finished his command upgrade to fly also from the right-hand seat if he had performed the appropriate simulator training? Does regulation have a restriction on that?
46 views

### Is airport's magnetic variation value used for terminal procedure design?

I am studying how instrument flight procedures are coded to ARINC-424 format, and since I was curious about the method used to determine the outbound/inbound magnetic courses, I checked the section ...
219 views

### Why are so many tail-strike incidents not verified until later inspection?

One often reads of a "suspected tail-strike" at take-off (for example suspected because a controller has seen something from the tower, or because a cabin crew member sitting at the back of the plane ...