Progress on an ICAO Wake Turbulence  Re-Categorization Effort

Lang, Steven; Tittsworth, Jeffrey; Bryant, W. H.; Wilson, Paul; Lepadatu, Catalin; Delisi, Donald P.; Lai, David; Greene, G. C.

doi:10.2514/6.2010-7682

Cited by 22 publications

(13 citation statements)

References 1 publication

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“…Wake turbulence recategorization (RECAT) is a collaborated effort of International Civil Aviation Organization (ICAO), Federal Aviation Administration (FAA) of the United States and European T Organization for Safety of Air Navigation (Eurocontrol) to redefine wake turbulence categories and their associated separation minima to increase capacity of airports [5]. Runway capacity of airports primarily depend on radar surveillance capabilities and wake turbulence circulation generated in-trail of aircraft.…”

Section: Recat Conceptmentioning

confidence: 99%

RECAT Uygulamasının İstanbul Yeni Havalimanı Hava Trafik Akış Yönetimine Olan Etkisinin Kesikli Olay Benzetimi ile Analizi

Çetek

Aydoğan

2019

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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The rapid annual increase in air traffic volume leads to serious capacity problems especially at major airports. Airport runway capacities are significantly limited by wake turbulence phenomena between arriving and departing aircraft pairs. RECAT, an international joint effort, aims to redefine wake turbulence categories and their associated minima to increase runway capacities. This study analyses the impacts of possible RECAT implementation on arriving and departing flight sequences for independent parallel runway configurations with saturated demand. Istanbul New Airport is modelled as a test case using Simmod Pro, a discrete-event simulation tool. A baseline and an alternative scenario has been created to compare the current and RECAT separation minima. The implementation of RECAT improved the total throughput and reduced airborne delays for arriving flights while it increased departure queue delays and lengths. Further operational strategies are required to increase the benefits of RECAT for departing flight sequences.

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Section: Recat Conceptmentioning

confidence: 99%

RECAT Uygulamasının İstanbul Yeni Havalimanı Hava Trafik Akış Yönetimine Olan Etkisinin Kesikli Olay Benzetimi ile Analizi

Çetek

Aydoğan

2019

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…Two research bodies are leading these re-categorization efforts: the Eurocontrol RECAT-EU in Europe and RECAT from the Federal Aviation Administration in the United States. The methodology employed examines the wake strength as the primary hazard metric that is derived from data on wake decay, as discussed in Section VI [22]. Outcomes for the A380 spacing, however, are opposing.…”

Section: Wake Turbulence Recategorisationmentioning

confidence: 99%

“…WT re-categorisation schemes examine the commercial airline fleet and are being extended to include over 9 000 aircraft globally [22], however do not appear to include Very Light Wake Category (VLWC) aircraft such as Mini RPA, possibly below 20 kg, and Micro RPA, perhaps hand sized. These are outside the scope of present research and new WT categories have yet to be formulated.…”

Section: Wake Turbulence Recategorisationmentioning

confidence: 99%

Consideration of wake turbulence during the integration of Remotely Piloted Aircraft into the air traffic management system

Guerin¹

2015

2015 International Conference on Unmanned Aircraft Systems (ICUAS)

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The last decade has witnessed both the growth in Remotely Piloted Aircraft (RPA) numbers and the introduction of the Airbus A380, the largest passenger aircraft to enter commercial service. Both introduce extremes at either end of the spectrum for weight and wingspan: into an Air Traffic Management (ATM) System where wake vortex separation minima have been unchanged for three decades. However, airport congestion may compel a rethink, and the mandated separation distances in place for wake turbulence are under scrutiny. Remotely Piloted Aircraft Systems (RPAS) will inject yet another permutation into deliberations for separation standards and wake turbulence considerations. However, aside from complicating the space, RPA offer a means to reduce the mandated gaps, and subsequently alleviate capacity issues. This paper examines wake turbulence and its effects and proposes trials to reinforce reductions or expansions of present and future separation minima.

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“…The FAA's Wake Turbulence Research Office has worked with the FAA's regulatory agency to assess new aircraft. In addition, the Air Traffic Organization and Aviation Safety within the FAA are pursuing a new wake turbulence categorization that includes aircraft characteristics, in addition to weight, that more completely define the wake turbulence risk as a generator and encounter aircraft (Recategorization [2], RECAT I, RECAT 1.5 [3] and RECAT II).…”

Section: Introductionmentioning

confidence: 99%

Use of Simple Models to Determine Wake Vortex Categories for New Aircraft (Invited)

Hallock¹,

Greene

Tittsworth

et al. 2015

7th AIAA Atmospheric and Space Environments Conference

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The paper describes how to use simple models and, if needed, sensitivity analyses to determine the wake vortex categories for new aircraft. The methodology provides a tool for the regulators to assess the relative risk of introducing new aircraft into the current fleet. Nomenclature b= wingspan, ft b 0 = separation of the two rolled up vortices, ft C l = roll moment coefficientDepartment of Transportation FAA = Federal Aviation Administration ICAO = International Civil Aviation Organization IFR = Instrument Flight Rules L = lift MLW = Maximum Landing Weight, lb MTOW = Maximum Certificated Gross Takeoff Weight, lb N = number of non-dimensional time units for vortex strength to go to zero NM = nautical miles NTSB = National Transportation Safety Board q = dynamic pressure, kg/(m sec 2 ) r = radius of vortex, ft RECAT = Recategorization RMC = roll moment coefficient s = spanwise loading coefficient S = wing area, ft 2 sec = second(s) T = non-dimensional time or torque 1 2 U = final approach speed, ft/sec U ∞ = aircraft speed, ft/sec US = United States V v= tangential velocity of a vortex, ft/sec W = weight, lb y = distance along a wing from the center of the fuselage, ft α = angle induced on a section of a wing due to a vortex, radians Γ = vortex circulation strength, ft 2 /sec Γ 0 = initial vortex circulation strength, ft 2 /sec ρ = air density, slug/ft 3

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Progress on an ICAO Wake Turbulence Re-Categorization Effort

Cited by 22 publications

References 1 publication

RECAT Uygulamasının İstanbul Yeni Havalimanı Hava Trafik Akış Yönetimine Olan Etkisinin Kesikli Olay Benzetimi ile Analizi

RECAT Uygulamasının İstanbul Yeni Havalimanı Hava Trafik Akış Yönetimine Olan Etkisinin Kesikli Olay Benzetimi ile Analizi

Consideration of wake turbulence during the integration of Remotely Piloted Aircraft into the air traffic management system

Use of Simple Models to Determine Wake Vortex Categories for New Aircraft (Invited)

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