Leaving aside all the standards and design criteria set out in detail in Annex 14 of ICAO and other regulations and recommendations for the planning of airports, I conduct a brief analysis on a topic that generates, at least, discussion. The problem of deciding if a track is either not sufficient for a certain airport is not easy, and therefore requires some aeronautical culture to speak of it as a means of communication (journalists) to get to approach the media to information public (general public). I hope that this information is useful, here I discuss with brief comments about the airport of Leon.
The Leon airport runway is 3,000 m long and 45 meters wide. A lot or a little? That is the question. And to answer we must look at many factors. Some are more or less obvious for anyone interested in the topic: demand, type aircraft at the airport, aspirations for the future ... However, from a more qualified view, the parameters to evaluate increases, temperature, slope, altitude ...
Each aircraft has defined curves that give the track needs in terms of different operating variables (weight, flap settings, engine, for example), temperature and altitude at the aerodrome. These curves are defined in the Airport Planning Manual of each aircraft, which offers the most relevant information for the operation, handling and airport design appropriate to it.
In general, in a first study in airports, are generally taken into account that the runway length requirements vary depending on:
The Leon airport runway is 3,000 m long and 45 meters wide. A lot or a little? That is the question. And to answer we must look at many factors. Some are more or less obvious for anyone interested in the topic: demand, type aircraft at the airport, aspirations for the future ... However, from a more qualified view, the parameters to evaluate increases, temperature, slope, altitude ...
Each aircraft has defined curves that give the track needs in terms of different operating variables (weight, flap settings, engine, for example), temperature and altitude at the aerodrome. These curves are defined in the Airport Planning Manual of each aircraft, which offers the most relevant information for the operation, handling and airport design appropriate to it.
In general, in a first study in airports, are generally taken into account that the runway length requirements vary depending on:
- Altitude: increase by 7% per 300 m. above the sea (Above Sea Level: ASL).
- A 1% per degree from 15 ° C above the reference temperature aerodrome, which is the average daily maximum of the warmest month.
- 10% when effective grade is 1%.
The facilities of the Virgen del Camino is located to 916 m. ASL have a reference temperature of 28 º and slopes increase towards the center in less than 0.2%, except for the first 255 m. from the head 05. Thus, the bad and fast, the Leon airport for practical purposes have a clue of 2,400 m. if hubicáramos at sea level with a reference temperature of 15 degrees and fully flat.
From another point of view, if we go with the data from the airport in the Airport Planning an ERJ 145, fully loaded for take-off and needed something more than 2,650 m. There is not so far the figure of 3,000 m. before we could look somewhat elevated.
Why I have seen planes take off at the airport off in less than a thousand yards? The answer is security. Not that the need Embraer 2,650 m. to rise no more, but require them to do so with safety . Let's see this in more detail.
Engineers, at least act with some ethics, should be placed somewhat in the worst possible . In the case of the operation of the aircraft, we can make an example of a couple of situations that were clearly observed where the shots go on the issue that concerns us:
From another point of view, if we go with the data from the airport in the Airport Planning an ERJ 145, fully loaded for take-off and needed something more than 2,650 m. There is not so far the figure of 3,000 m. before we could look somewhat elevated.
Why I have seen planes take off at the airport off in less than a thousand yards? The answer is security. Not that the need Embraer 2,650 m. to rise no more, but require them to do so with safety . Let's see this in more detail.
Engineers, at least act with some ethics, should be placed somewhat in the worst possible . In the case of the operation of the aircraft, we can make an example of a couple of situations that were clearly observed where the shots go on the issue that concerns us:
- Aircraft at maximum weight (MTOW) and failure motor before reaching v1 (velocity from which we must take off or yes, to understand), apply brake to stop, accelerate-stop .
- aircraft at maximum weight (MTOW) and last v1 engine failure, forcing the flight of a single engine (or all that apply): takeoff distance with engine failure .
addition, we must consider the influence of other factors that lengthen braking and hinder the arrest, the main rain or wet pavement, to extend both the accelerate-stop and landing distances . is also interesting to note that not all the surface of a track is available for use in takeoffs or landings. For example, at the airport in Leon, the landing distance at this point in the approximation 23 is 2,100 meters, the displaced threshold to be 900 m. For other operations if fully available to 3,000 m.
For those who want to know more, I leave the links to a couple of letters from AENA the airport and another at the Airport Planning Manual of the ERJ 145.
Note: To view AENA all the cards you will have to enter your website and access www.aena.es Aeronautical Information (AIS), where you have to log-in.
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