No abstract

Regional aircraft are playing a significant role in airline operations. This paper considers the problem of selecting an appropriate aircraft from the airline fleet for optimal regional air travel realization. Complexity balance between air travel demand (passengers, goods) and the proposed aircraft capacity presents the priority in airline operations. A principal feature of the methodology considered in this paper is a multi attribute analysis of technological and operational aircraft characteristics (turboprop and turbojet). A comparison of the presented regional aircraft parameters is based on the following criteria: technological (aerodynamic efficiency, structural efficiency, fuel flow at the optional FL, cruise endurance and requested trip fuel for the fixed cruise range), operational (max range with max payload, ground efficiency (aircraft maintainability based on external dimensions) and climb capability. With the aim of defining aircraft rank, the TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) method was applied. Therefore, the Saaty scale was used for developing the weight of different criteria. The conducted research included a sample of four representative regional aircraft: Do328, CRJ100er, Saab2000 and ERJ145. The results obtained would help in determining the airline fleet or selecting the optional solution from the existing fleet.

The problem of the aircraft noise is certainly one of the factors that affect not only at the planning of a new airports or expanding of the existing airports, but also at the aviation industry as a whole. In order to mitigate this problem, a series of a different measures are undertaken today, whose effects are finally evaluated by the application of an appropriate indices and the aircraft noise metrics. In this paper, a brief chronological review of the aircraft noise metrics development is shown, as well as their classification according to the different criteria. The analysis of the certain aircraft noise metrics, with the close attention to their interconnections, is accomplished. Additionally for the nowadays frequently used metrics and their advantages and limitations, special attention was given. An overview of the supplemental aircraft noise metrics, which are now proposed and as such can be accepted by the general public, is given. Key words: aircraft, noise, metrics

No abstract

The critical concern of modern airports is the air pollution generated by air traffic and its impact on the airport environment. Air pollution is an unavoidable consequence of air traffic, but it can be reduced in numerous ways, including technical innovations in aircraft design and legislation. This paper presents a model of air traffic assignment as a measure to mitigate the concentration of air traffic pollution. The air traffic assignment model was developed specifically for Nikola Tesla Airport but could easily be applied to other airports. The model is based on the categorisation of aircraft according to engine type and the assignment of specific runways for take-off and landing for each aircraft category. It incorporates two basic goals: to increase airport capacity and to reduce the pollution level in the area around the airport. Although these goals are contradictory, it has been shown in the case of Nikola Tesla Airport that the proposed air traffic assignment model successfully creates pollution level equilibrium in the area around the runway thresholds and an increase in airport capacity. The paper suggests pollution measurement points as the basis for a pollution management tool and system for daily air traffic pollution control. Santrauka Šiame straipsnyje aprašomas oro transporto paskirstymo modelis, leidžiantis sumažinti oro transporto srautų sukeliamą oro taršą. Šis modelis sukurtas Nikola Tesla oro uostui, bet yra lengvai pritaikomas ir kitiems oro uostams. Modelio pagrindas – tai orlaivių klasifikavimas pagal variklių tipus ir tam tikrų KTT paskyrimas atitinkamoms kategorijoms. Siekiama išnaudoti visas oro uosto galimybes ir sumažinti taršos lygį. Nors tikslai atrodo priešingi, tačiau įrodyta, kad pasiūlytas oro transporto paskirstymo modelis sėkmingai išlaiko taršos lygio pasiskirstymą prie KTT pradžios ir padidina oro uosto galimybes. Taip pat siūlomi tinkami taršos matavimo taškai kasdienei oro taršos kontrolei.