Waked
  • Member for 6 years, 11 months
  • Last seen more than 2 years ago
Why are listed times of useful consciousness so low?
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42 votes

In short: acclimatization, both chronic and acute. During your Tibet-trip, you had probably spent days at high altitudes, allowing your body to acclimatize to the lower oxygen partial pressure (...

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What is the purpose of a dorsal fin such as on the Boeing 737?
28 votes

The "extension" at the front is called "dorsal fin". Its main purpose is to improve directional stability in high side-slip situations (asymmetric flight due to engine failure, crosswind landings, etc)...

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How do aircraft altimeters calculate altitudes accurately while airborne?
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25 votes

Altimeters are calibrated to a standard atmosphere model (International Standard Atmosphere, ISA). What the altimeter shows you is the vertical distance between the altitude equivalent to your ...

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Do airline pilots use FD when performing visual landing?
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15 votes

This answer will be quite anecdotal (I have not seen a survey on the question). It will answer the question for "most people I've worked with", and for "my" aircraft (B737NG). Also, the usual ...

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Why is the initial short-field climb below Vₓ in a Cessna 172?
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14 votes

$V_X$ published in the manual is $V_X$ for flaps up. $V_{X_{F10}}$ will be slower than $V_{X_{UP}}$. Most likely, the speed in the procedure is, or is very close to $V_{X_{F10}}$. $V_X$ (speed for ...

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Do autopilot headings consider the earth's shape?
13 votes

Yes, almost all modern computer navigation systems take this into account. The track between two points along the "spherical" earth is called the great-circle track. Except for a N/S heading (or a E/...

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Does it make sense to do an emergency landing without nose gear in order to reduce stopping distance?
10 votes

To my knowledge, no established procedures exist for any contemporary civilian airliner that would land with any gear up to decrease landing distance. However, contrary to other answers/comments, in ...

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Where can I look up FAA Letters to Airmen?
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10 votes

They are searchable at FNS NOTAM search: https://notams.aim.faa.gov/notamSearch/ A link is provided to a PDF, containing a link to the actual LTA. (Filter by LTA, remember the agreement might not ...

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How to calculate the real Ground Speed from True Air Speed?
9 votes

First calculate horizontal component of airspeed, then add the wind: $$v_{GS} = cos(\theta) * v_{TAS} + v_{wind}$$ with $\theta$ being the angle between the horizon and the path of the aircraft in ...

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Are carbonated drinks considered dangerous goods for air freight?
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9 votes

Each operator is of course entitled to apply stricter regulations, but there's no restriction against carbonated drinks in the IATA-DGR (based on the ICAO TI, which sets out the framework for ...

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Where can I find airport taxi instruction "code names"?
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9 votes

Excerpt from the FAA Publication "Instrument Procedures Handbook": Standard taxi routes improve ground management at highdensity airports, namely those that have airline service. At these ...

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How do I remind myself to run in-flight checklists?
8 votes

In my view, the best tool for reminding yourself of recurring "household chores" is by using a timer, if the noise profile of your aircraft allows it. (Try it! You can probably hear more than you ...

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Could a pilot navigate using distances and radials from an RNAV waypoint, similar to VOR navigation?
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6 votes

In a modern B737 (NG/MAX) (and probably most other comparable aircraft), this is trivial. The simplest (and most realistic option for an emergency turn procedure) would be to fly the procedure in HDG ...

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How can the pilot tell the center engine failed on a piston aircraft with three engines?
6 votes

Without having flown this particular aircraft: According to Wikipedia, the aircraft is powered by the, non-turbocharged, Lycoming O-540-E4C5. This means that in a climb for instance, where you'd ...

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Why does V1 increase with weight?
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5 votes

Other than being controlled by Take-Off Run/Distance Available (TORA/TODA) or Accelerate Stop Distance Available (ASDA), all field limits, maximum $V_1$ is also controlled by $V_R$ (Speed for rotation)...

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Do pilots have procedures and safeguards against unintended altitude captures?
5 votes

On the Boeing 737 NG: ALT ACQ is always armed when flight directors and/or autopilot is engaged in a climb/descent mode (V/S, VNAV, LVL CHG, TO/GA, CWS P), it is however, as you suggest, inhibited in ...

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May I enter Class C airspace if I'm told "remain VFR"?
5 votes

No clearance is required for VFR Flight in Class C airspace. It is however required to establish two way radio communications (FAR 91.130). The most common interpretation I've come across is that as ...

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Does the airflow from a propeller over a wing contribute to lift?
5 votes

A propeller not affecting the velocity of the free stream air would not generate any thrust (or drag), as the propeller works by the principle of creating thrust by accelerating a large mass of air, $...

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Will ATC proactively route traffic around bad weather?
5 votes

My experience from flying Commercial IFR in Europe is that ATC never proactively re-route around bad weather, but are however usually expedient handling requests from pilots (heading changes to ...

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Where can I find (online) manuals for refueling A320/B737 for a given destination?
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4 votes

Very rarely will a manual directly be used by flight crew for calculation of fuel uplift. Flight crews generally receive an Operational Flight Plan prepared by the operator (the airline), or an agent ...

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What is the standard procedure in case of inconsistent sensor readings?
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4 votes

The procedure used would depend on which information is conflicting/unreliable (and of course the aircraft type). With one or more unreliable airspeed indications (which is one of the more critical ...

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Can you fly an airplane at a 90° roll angle without losing altitude?
4 votes

During "normal" flight with wings level, the amount of lift generated will vary with the wings angle of attack (alpha). Within the normal flying envelope of the aircraft, the relationship between lift ...

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What do Air Traffic Controllers (tower supervisors) say to pilots before takeoff and landing?
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3 votes

ICAO document 4444 contains phraseology and pronounciation in chapter 12. It might however be a little bit difficult (but not impossible) to find online, as ICAO documents are rarely officially ...

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Will driving experience benefit flight training?
3 votes

From my subjective experience, training pilots without driving experience is not a big deal, as long as it not an indicator of being uninterested in things technical. (Remember, tons of people start ...

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When is a sailplane a sailplane?
3 votes

The easiest way to find out for a particular aircraft type is to check its (TCDS) Type Certificate Data Sheet. In it, you will find its certification basis and airworthiness category (CS-22, CS-23, CS-...

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How can ADS-B replace primary radar when FlightRadar24, using ADS-B, is so inaccurate?
2 votes

As stated in other answers, the receivers used by FR24 is not the same receivers as ATS use. In a comment you indicate that this is irrelevant: "I'm not asking about coverage, but position accuracy,...

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Dead reckoning navigation: gyromagnetic compass, how it is stabilized?
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2 votes

Gyromagnetic compasses do indeed exist even in smaller aircraft, and need not be overly complex. The basic principle for an analog system is as follows: Heading is measured against a gyro rotating in ...

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Wind correction on downwind during circling
1 votes

Yes, they need to be corrected, mainly for two reasons: 1) Legally, the horizontal criteria for circling is the distance from the threshold of each usable runway (search for TERPS circling criteria ...

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Is an RT license required for EASA PPL holders?
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1 votes

EASA itself does not require a RT license (RT is usually legislated on national level), however, it gives the state issuing your license the possibility to include RT privileges as part of your ...

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How minimum runway length is calculated for PAC P-750 XSTOL?
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1 votes

You can't, at least not on the basis of the POH you linked. Taking off with 0° flaps for that aircraft is outside the POH limitations chapter. 2.20 Flap Limitations: Approved flap ranges. TAKEOFF ...

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