99

Historically, Gatwick had only one runway (08R/26L) with a taxiway to the north, but this obviously would cause problems if that runway was out of use for any reason - emergency, scheduled maintenance, etc. In 1979, the taxiway was upgraded so that it could be used as a runway when the main runway was out of use. Since this used existing infrastructure, the ...


86

V1. There are other valid reasons, as have been listed - cost, bidirectional runway use, etc. These would still not completely disqualify ramps, just limit them to very special circumstances. But the one disqualifying factor is that a ski jump takeoff removes the necessary element of safety airliners depend on during takeoff. Up to a certain airspeed, ...


81

I'm pretty sure that has to do with reflections especially at night. If you have ever stood between two mirriors you will understand the infinity mirror. Light bounces back and forwards between the mirrors so when you look into them it appears like the scene goes on forever. Window glass reflects a certain amount of light, like a mirror. In a control ...


70

Because those symbols are easily confused with the number 0, the number 1 and the symbol for a closed runway/taxiway (✕) respectively. (1) Numbers by themselves, and the letters "I" and "O" must not be used because they could be mistaken for a runway number. (2) The letter "X" must not be used because a sign with an "X" could be ...


65

There are a few possible reasons Bournemouth (EGHH) can support a Boeing 787 but Kherson (UKOH) can't. Runway length is definitely not the issue. The runway at EGHH is 2271 metres long, the one at UKOH is 2500 metres long. The runway at UKOH is slightly narrower, though: 42 metres compared to 46 metres at EGHH. Whether this has operational significance, I ...


58

Anyone who has ever flown at Zar (EPZR) in Poland knows how much a runway slope can reduce the needed field length. For aircraft which need a 2 miles long level runway, a 1 mile long one with a 15% slope at its end will do just fine. Make the slope shallow at the bottom and increase it the further up the runway goes, just like the hillside runway at Zar. If ...


58

There are perhaps 101 non aviation-related reasons why the UK does not have larger airports, such as space consideration (we're only a small island!), politics (NIMBY!), civil engineering (Airports are commonly near urban centres and are often surrounded). However, the most aviation-related related reason I can think is that we just simply rarely need cross ...


53

There are numerous joint use (commercial/military) airports with separate terminals/ramp areas. There aren't many where there are two connected fields. The only one I'm aware of is Naval Air Station Whiting Field near Milton FL that has two operational fields with separate identifiers. There is NAS Whiting Field - North. ICAO: KNSE and NAS Whiting Field - ...


48

Because then you can only land in one direction. What do you do if the wind blows exactly along the runway so that departing and landing planes have only tailwind then? You would waste a precious runway by having such a big obstacle on it. Moreover, an upward ramp might not be what is needed. Look for example at Lukla (or, as ManuH mentions in the ...


47

It allows them to do a run-up test of the engines without blowing debris at other parked aircraft, people, or things on the ground. [Credit to Ralph J] The walls have a structure that allows the noise of engine run-ups to be absorbed as well. Engine run-ups, especially multi-engine run ups, can be very loud. You can read more about IAC-Acoustics ground ...


43

Why do passenger embark on the left side of an aircraft? Because the cavewoman who invented the log-canoe was right-handed? Note: I arrived at this answer by looking at a kind of etymology of the terms starboard & port but that's incidental. The answer to this question happened to be contained in an answer to a rather different question. Some groups of ...


43

I think Chitose and New Chitose on Japan's Hokkaido island fit the criteria. One is an air base (Chitose) with ICAO code RJCJ, while the other is the island's primary civilian airport (New Chitose) with ICAO code RJCC. They have separate runways, but they're jointly operated and linked by taxiways. It's quite cool watching the air base's jets while you're ...


41

Just spoke to the farmer that owns Graham Farms Airport (SN72), a grass strip in a cornfield near the sprawling metropolis of Harris, Kansas. Here it is on the sectional: And Google Earth: He has a Cessna 182 there. He told me he had it registered as an airport back in the 1970's, like Dave said, in case someone had an engine failure or something, ...


40

In some cases the prevailing winds change and certain runways fall out of use. Since airports tend to be land limited they may wish to use the land for hangars or other facilities so the runways are eventually decommissioned. In other cases it could a noise abatement issue, many airports predate the property development that often surrounds them. It may be ...


36

Private airfields are not at all uncommon in the U.S., especially the rural parts (which is most of the U.S.) These are probably for crop dusting or because the owner also happens to be a private pilot and wants to keep their plane at home rather than paying the local FBO for hangar or tie-down rental. Of the ones I've seen, though, the markings vary from ...


36

It exists for some aircraft carriers and it's called a ski-jump. It wouldn't work well for land runways because they're typically used from either end depending on the wind. Moreover, land planes don't use the whole runway, failures notwithstanding, they takeoff before the end and by regulations must clear a certain height before the end (depends on the ...


35

@Simon is right. The 'parking lots' are actually dispersal areas in the (previous) military airfield at that place. The Cologne Bonn Airport started out as an airfield for Luftwaffe in 1938 in what was a former artillery shooting range. After war, RAF took over the airfield, with the first civilian flights in September 1950. The airfield was converted for ...


35

Frankfurt Airport; a mosaic of concrete and asphalt The runways at Frankfurt Airport are asphalt (old satellite imagery shows that they were concrete before), and the airport handles plenty of Superjumbos, the Airbus A380, so it's not a matter of handling heavy planes. All runways in big airports, even those covered in asphalt, have reinforced concrete ...


35

An immobile jet blast deflector could not be built far enough away from the runway end to be safely clear of the landing path. Large airplanes like 747s must touch down pretty close to the near end of the runway, which is right at the edge of the beach, a blast deflector would be a serious hazard if an airplane came in a bit too low. Here's what I'm talking ...


34

I do not know the exact numbers for oleo stroke and so on, but this is how you would calculate this. A 747-400 weighs 400 tons on take-off and 296 tons on landing, maximum. See here for the source of those figures. Next is the landing speed, this is approx. 160 knots = 82 m/s. Now let's assume the pilot has misjudged the height and does not flare, but slams ...


34

The airports in Berlin share runways. Strictly speaking, one of them (BER) isn't really operational... But it will be. Soon. For sure... Hey, look over there: a monkey with two heads!! google maps


32

Schiphol indeed seems to have enough space to build a runway close to the terminal. However it is more the lack of airspace and laws preventing excessive sound levels that made it necessary to create the "polderbaan". It is also one of the two primary runways for nightflights (link in Dutch (sorry). Found a reference in the English wikipedia: Newest ...


32

There is at least one: In Gisborne, New Zealand, there is a freight rail line which crosses the south end of runway 14/32 at Gisborne Airport (GIS). It appears to still be an active line for freight (logging) haulage, as well as occasional passenger excursions. Image source: Google Maps, plus own annotation. This article has some additional pictures and ...


31

It's ALL about land use. Look at Mirabel, Denver's new airport, or Dulles (at the time it was built). They basically razed some farmland. America had the opportunity to do a whole lot of that. Whereas in the UK, you have an ancient civilization dotted with villages, the entire system of landed [owns land] gentry (as seen on Downton Abbey; Highclere ...


30

They are specially designed apron jet bridges. It looks like the normal gates but required to transfer passenger by bus. A model shows how it runs (credit) :


29

1. Terrain and land use Several new airports are build on landfill island or coast next to mountains, their shape is influenced by the terrain and their size. Hong Kong International Airport runways and shape are influenced by the terrain. Its curved east bank looks like the Chek Lap Kok island, which the airport is built on there. Both HKIA runways are ...


29

Oakland International Airport (IATA: OAK, ICAO: KOAK, FAA LID: OAK) is an international airport in Oakland, California, United States. Oakland International Airport covers 2,600 acres (1,100 ha) and has four runways. OAK has in essence, two independent operations running as one complex. Commercial flights and cargo operations operate primarily out of ...


28

Three runways (or pairs) 60 degrees apart was very common. Where land was limited, two runways (or two pairs) at 90 degrees was almost as good. These generic designs could be built very quickly almost anywhere and work well regardless of the prevailing winds, which was particularly important when building hundreds of them in a hurry during WWII. However, ...


26

Along the approach path there is high terrain that causes turbulence and challenging winds. But it is also easyJet's call to classify any airport as they see fit. On a scale from A to C, they classify Heraklion as B. Other Cat B airports are where the takeoff performance calculations can be tricky as the excerpt below shows: Category B translates roughly ...


25

There are no physical restraints to entering the runway when the road is open. You can see from this video of the crossing that Gibraltar police and the base for the Royal Air Force are present. The runway is owned by the Ministry of Defence. Anyone attempting to drive on the runway will probably be intercepted in seconds, although I am not aware of any ...


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