Started by jamespetts, May 26, 2017, 01:16:47 AM
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Quote from: Vladki on May 26, 2017, 09:22:07 PMI don't know how airports without atc work. But I think that the big airplanes have to report to some ATC all the time. Not only for takeoff/landing. But that may have not been the case in early years.
Quote from: DrSuperGood on May 27, 2017, 07:26:26 AMOne might be limited to only 2-4 simultaneously in transit flights to airports within 50-100km of each other. When a plane tries to depart a stop it will refuse to do so if there are too many in transit flights within the 50-100km area of its intended destination unless there is also a airport control tower within that area. This is a bottlenecking limit unrelated to line configuration or number of convoys.
QuoteThe actual limit should change with time. Back in the 1960s plane safety was nowhere near as good as now and neither was the control tower technology so one could expect more risks such as more planes heading to an airport etc. In 2017 control towers are pretty much mandatory for any airport that receives all but the smallest of traffic volumes as they aim for as good as no collision chance.
QuoteThe control area of a control tower should increase with technology and size. A 1960 one might only be able to control a small area due to mostly relying on vision or basic radar. In 2017 advanced tracking keeps watch on aircraft 100s of km away with the control towers only needing to be positioned right near runways for visual security (in case all the tech fails they can still look out the window).As such one could have control towers with a few properties.1. Line of Sight range. Some aircraft require being in this range to take off, especially modern large scale passenger aircraft.2. Radio range. Some aircraft require their destination to be in this range before departing, especially modern large scale passenger aircraft.3. Control range. Aircraft require that their destination be in this range before departing if more than a time period relevant number of aircraft are in transit within a time period relevant range of their destination.Practically all, not light aircraft, modern airports have line of sight and radio range. It would be too dangerous to land otherwise and put passengers at too much risk. However control is only needed for busy areas to handle more than a couple of flights at the same time. As time progresses, control becomes more important as more strict regulations mean that fewer aircraft can safely land in close proximity.Additionally one could add services to airports, such as fire response. Some aircraft types require that both source and destination airport have such services before departing, eg modern large scale passenger aircraft. This would be a different type of building and have a service range (5-10 km odd, usually 1 is enough to cover entire airport complex).
QuoteAlso, from what I understand, it is not generally necessary for aircraft to line up on the runway and wait at non-towered airports: they can just keep going from the taxiway, as they will have been checking their environs visually and by radio during taxiing.
QuoteHas the proportion of non-towered airports declined over time? It would be interesting to see data on this. Also, is this idea of an actual traffic limit on airports without towers not similar to my original suggestion?
Quote from: Ves on May 27, 2017, 01:40:37 PMI think there is a big difference between number of lines serving the airport, and number of vehicles at the same time that serves the airport. While the limitations by vehicles seems reasonable, the limitations of lines feels kind of artificial. An airport with only one line can certainly be more buisy than an airport with 10 lines! Just fill that one line with alot of vehicles and you will have a buisy airport.