Skip to main content

Evaluating Airfield Capacity (2012) / Chapter Skim
Currently Skimming:


Pages 14-32

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 14...
... 12 Airfield Capacity Concepts Airfield capacity is a function of the airport's physical facilities or components; its layout or geometry; its operating environment, including the airspace allocated to the airport and specific air traffic control (ATC) and flight procedures; the mix of aircraft using the airport; and weather conditions (i.e., ceiling, visibility, and winds)
From page 15...
... airfield Capacity Concepts 13 Airside Components Including Airfield Geometry All of an airport's components -- airside, landside, and terminal -- work in conjunction with one another in operation of the airport. The airside components, including airfield geometry, are generally the limiting factor governing the ultimate capacity of the airport.
From page 16...
... 14 evaluating airfield Capacity wingtip clearance to adjacent buildings and aircraft. Runways are generally oriented in the direction of the prevailing winds; aircraft operate best with a headwind, and most aircraft have limited ability to fly with strong cross winds or tailwinds.
From page 17...
... airfield Capacity Concepts 15 and after landing. Such taxiway use frees the runways to be used efficiently for takeoffs and landings.
From page 18...
... 16 evaluating airfield Capacity Large aprons can include taxilanes, which are areas identified to provide access between taxiways and aircraft parking positions. The combination of the apron and taxilanes is generally referred to as the non-movement area.
From page 19...
... airfield Capacity Concepts 17 terminal entrance points are not typically called gates; this term is typically used at commercial service airports. Gates are designed to accommodate different types of aircraft and can affect capacity if the number of gates provided is inadequate to accommodate arriving or departing aircraft, or if the layout of gates impedes taxiing aircraft from reaching the runway ends in a safe and efficient manner.
From page 20...
... 18 evaluating airfield Capacity The National Airspace System (NAS) includes more than 19,000 airports, about 5,200 of which are open to the public; 400 ATCTs; 197 Terminal Radar Approach Control (TRACON)
From page 21...
... airfield Capacity Concepts 19 another, the air traffic controller passes the aircraft off to controllers responsible for the other airspace sector. Much of the current ATC system relies on ground-based navigational aids and radar.
From page 22...
... 20 evaluating airfield Capacity direction in which they are flown. Left-hand patterns are standard, because most small aircraft are piloted from the left seat; but right-hand patterns are used frequently for other reasons (e.g., to accommodate parallel runways, for noise abatement, and to manage terrain issues)
From page 23...
... airfield Capacity Concepts 21 While the primary emphasis of NextGen is on safety and efficiency, the potential improvements in airfield capacity are significant. Airfield capacity improvements are anticipated as more precise surveillance, navigation, and controller automation tools reduce effective separation between aircraft.
From page 24...
... 22 evaluating airfield Capacity the tips of the aircraft wing and trail behind the aircraft, creating a danger for smaller aircraft that might be caught in the wake. Behind large aircraft, these wake vortices can be very strong, and controllers must build in extra separation to protect against a dangerous wake encounter.
From page 25...
... airfield Capacity Concepts 23 1. Airfield geometry 2.
From page 26...
... 24 evaluating airfield Capacity exit at nearly the same speeds. Usually an aircraft will need to slow down on a runway to use a 90-degree or reverse-angle exit, thereby taking more time on the runway and reducing airfield capacity.
From page 27...
... airfield Capacity Concepts 25 craft types operating on the same runway can significantly affect the capacity of an airfield: the greater the differences in aircraft performance and wake turbulence categories, the greater the adverse effect on capacity. The size, engine power, and weight of an aircraft also affect its approach speed for landing.
From page 28...
... 26 evaluating airfield Capacity Long distance flights also affect airfield capacity as airlines schedule flights when passengers demand them. Most passengers generally do not want flights that arrive or depart in the middle of the night.
From page 29...
... airfield Capacity Concepts 27 These distinctions are important because, assuming all other factors are equal, fewer aircraft operations can occur when visual approaches are not conducted and aircraft require additional separation from one another. For example, in IMC, controllers can no longer apply visual separation from the ATCT or direct pilots to conduct visual approaches to the airport's runways; instead, full radar separations must be applied.
From page 30...
... 28 evaluating airfield Capacity particular runway to differ from the overall fleet mix serving the airport. Limitations on aircraft types able to use a particular runway can have negative effects on airfield capacity.
From page 31...
... airfield Capacity Concepts 29 Airspace Factors Length of Common Final Approach There are varying types of approaches to an airport's runways. The length of the common approach is the distance from the runway threshold out to the entry gate of the outer boundary, where aircraft operating at different approach speeds may open or close the gap between them during final approach.
From page 32...
... 30 evaluating airfield Capacity approach and departure paths cannot be operated simultaneously and must be shared (see Figure 2-14)

Key Terms



This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More information on Chapter Skim is available.