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Questions tagged [flight-level]

Altitudes above the transition altitude, where the altimeter is set to the standard pressure, and is expressed as the letters "FL" followed by the indicated altitude in hundreds of feet, e.g., FL380.

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67 views

Semi-circular rule for choosing a FL: Risk of head on collision with borderline headings (179, 359)?

If it happens that you fly a 179/359 heading in uncontrolled airspace, what's the risk of collision with aircraft flying in opposite direction?
2
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3answers
118 views

How is the quadrantal rule applied to VFR flights in Hungary?

I'm looking for a clear explanation for this quadrantal rule question (it applies to Hungary): A VFR pilot is cruising, en-route in level flight, above the transition level of FL035. His magnetic ...
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2answers
174 views

How does the nose of a plane self adjust down [duplicate]

I am not a Flat Earther. I understand that the plane's trim, speed and atmospheric pressure determine the plane's altitude. As the plane moves forward the Earth does indeed curve out from under it and ...
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2answers
132 views

Do pilots have a generally preferred “traffic” resolution?

For aircraft cruising along at altitude, it is common for the controller to assign an aircraft a new course or altitude or speed for some reason such as "for traffic". My question is, would most ...
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3answers
299 views

Does it help to climb in case of a partial engine failure?

When the engines of a airplane show irregularities that do not reduce performance but indicate a possible failure of the engines, is it useful to climb to a higher level, to increase the glide length ...
6
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1answer
972 views

Why do some countries separate a transition level and a transition altitude?

The US airway system uses a single transition level (or altitude), but some other countries like China separate a transtion altitude and a transition level with the transition layer in between. ...
3
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1answer
609 views

How does changing the altimeter setting in the US and elsewhere compare?

I have been trying to track down an answer to this question and I stumbled upon this website. Apologies if this answer is already out there. I have seen the FAR regulation, 14 CFR 91.121 - Altimeter ...
8
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2answers
180 views

Can different departure procedures have different transition altitudes at the same aerodrome?

Is it possible for operations and ATC to have different departures procedures with different transition altitudes at a single aerodrome? For example: SID RWY11 with a transition altitude of 2,000 ...
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2answers
5k views

What are the climb rates during the different phases of flight of an A320?

I have read about common climb rates for an A320. It is said that the initial climb rate for an A320 is between 15-20° and it differs depending on the weight and also the altitude. I therefore have ...
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4answers
2k views

Does density altitude affect actual altitude?

Student pilot here, working on my first rating. A lot has been drilled into my head about density altitude as we approach the hot summer months here in the northern hemisphere, and how it causes the ...
8
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3answers
19k views

How does one calculate true altitude?

"An aircraft is cruising at FL170. The altitude shown with QNH set is 17,500 feet. The OAT is -10 deg C. What is the true altitude?" The ISA temperature deviation is 9°C. My calculation is: 17,500' ...
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1answer
4k views

How does vertical separation work above FL400?

The information mentioned in "Jeppesen Airway Manual" is that after FL400, fight levels are FL430, FL470, FL510 for the 'even' FL's column. Normally, I would expect every level divided by a thousand ...
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0answers
210 views

Why airliners fly so high even when winds are more suitable at a lower altitude? [duplicate]

While playing a flight sim, I noticed West winds were very strong at levels >FL350 and weaker around FL270 above the US. I took a look at Flight Radar 24 to see at which level actual airliners were ...
10
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2answers
643 views

Is altitude information included in filed flight plan?

When the dispatcher produces and files the flight plan for a scheduled flight with ATC, are the determined optimal cruise altitudes part of the flight plan, or does the flight plan only contain ...
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2answers
2k views

Does ATC direct flights to fly eastbound at odd levels and westbound at even ones?

Do commercial airlines routinely travel at altitudes specified by the ATC based on the direction they are heading? Example: eastbound flights travel at odd levels and westbound flights travel at even ...
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1answer
3k views

Where can I find the transition altitude in different countries/regions?

Where can I find the transition altitude in different countries or regions? Hoping to cover as many places as possible. Links to the applicable regulations would be nice. See also: What is the ...
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3answers
53k views

What is the difference between “flight level” and “altitude”?

I have seen references to "FL180" and "FL300", and I know that they stand for Flight Level 180 and Flight Level 300. I've also seen references to "an altitude of 18000ft" or "an altitude of 30000ft". ...
42
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4answers
8k views

Why are many jet aircraft designed to cruise around FL350-370?

If the flight distance permits, the B737-800 will cruise at FL350, the A320 a little bit higher... Flying at FL370. Photo: Live from the Flight Deck by GolfCharlie232 (reframed) Elements such as: ...
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4answers
28k views

Flight Level Change or Vertical Speed - When to use it?

I've heard that some pilots have this difficulty to determine the correct use of both features. So, which is the difference between using the vertical speed, instead using the flight level change ...
11
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1answer
526 views

Where can I find regulations in different countries for flight level rules based on direction of flight?

I'm from Brazil, and here we use the West/East rule, so we use an odd flight level when we fly between 0/360 - 179, and when we fly between ...