2013 Session: 754

• Operational and Environmental Assessment of Electric Taxi Based on Fast-Time Simulation
  Abstract: Economic pressure and increasing environmental awareness foster the development of new taxi operation technologies and procedures. One of the most promising developments is the use of electrically powered landing gears for medium-sized aircraft in civil aviation. Meeting the prerequisite that the weight of the new equipment and the weight of the saved fuel is approximately balanced, operational as well as economic and environmental benefits can be achieved. This paper describes the method how to assess these benefits by means of a fast-time simulation model and shows exemplary results for two airports.The first of these airports, Frankfurt (FRA), is one of the major European hub airports. Due to the higher share of heavy aircraft, which are assumed not to be equipped with an electrical landing gear, the relative benefit of almost 20% fuel savings is lower than at the second airport in the study, Berlin Brandenburg International (BER), the new capital airport, which is estimated to open in 2013. As the share of medium-sized aircraft is expected to be higher, relative fuel savings of more than 36% can be reached there. Besides of these economic and environmental impacts, also operational benefits can be observed as the aircraft can back out from their parking stands autonomously. By this, the time-consuming coupling and decoupling of a pushback vehicle can be saved.
  Authors: Wollenheit, Richard; Mühlhausen, Thorsten
  Authors: Wollenheit, Richard; Mühlhausen, Thorsten
  Year: 2013
  Document Type: Paper
  Subject: Aviation
  Session: 754
  Paper Number: 13-0721
  Practice-Ready: Yes
• Empirical Assessment of the End-Around Taxiway’s Operational Benefits at Dallas-Fort Worth International Airport Using ASDE-X Data
  Abstract: At the present time, only a few airfields in the world have an End-Around Taxiway (EAT). Since December 2008, an EAT serves Dallas/Fort Worth International Airport’s (DFW) runways 17L, 17C, and 17R, with the purpose of reducing the number of runway crossings and therefore improving safety and capacity. This paper describes the results of the research project (funded by the FAA and performed by the authors) to assess the safety impacts of DFW’s EAT in terms of reduction in number of runway crossings. In addition, this paper empirically defines the enhancement in departure and arrival throughput achieved after the construction of the EAT. These assessments are based on data from DFW’s Surface Detection Equipment – Model X (ASDE-X) database. This study has found that the EAT has improved runway safety, increased capacity and reduced departure delay at DFW, although for several reasons its usage is essentially limited to runway 17L arrivals. The EAT has eliminated on average 51% crossings on runway 17C daily and over 83% percent of runway 17L arrivals use the EAT or cross runway 17C using low-risk taxiways. In fact, the EAT has nearly eliminated all mid-runway 17C crossings due to 17L arrivals.The EAT has exceeded the expected enhancements of departure and arrival capacity. Compared to pre-EAT operations, the ASDE-X data reveals that both departure and arrival demand have increased at DFW. However, EAT operation has allowed the daily mean arrival and departure maximum throughput rates to increase by 40% and 25%, respectively, while the mean daily maximum departure delay has decreased by 38%.
  Authors: Massidda, Antonio
  Authors: Massidda, Antonio
  Year: 2013
  Document Type: Paper
  Subject: Aviation
  Session: 754
  Paper Number: 13-5272
  Practice-Ready: Yes
• Operational and Environmental Assessment of Electric Taxi Based on Fast-Time Simulation
  Authors: Mühlhausen, Thorsten
  Authors: Mühlhausen, Thorsten
  Year: 2013
  Document Type: Presentation
  Subject: Aviation
  Session: 754
  Paper Number: 13-0721
• Empirical Assessment of the End-Around Taxiway's Operational Benefits at Dallas-Fort Worth International Airport Using ASDE-X Data
  Authors: Massidda, Antonio
  Authors: Massidda, Antonio
  Year: 2013
  Document Type: Presentation
  Subject: Aviation
  Session: 754
  Paper Number: 13-5272
• Building Flexibility Into Airport Planning and Facility Design Amid Uncertainty
  Authors: McNerney, Michael
  Authors: McNerney, Michael
  Year: 2013
  Document Type: Presentation
  Subject: Aviation
  Session: 754
  Paper Number: P13-7128