Mustafa Cavcar

• Anadolu University

In this study, the effects of the flight-path angle (FPA) ranging between 1.0 and 4.5 deg during a continuous descent approach, on certain fuel-related parameters such as fuel flow, fuel burn per 1000 ft of altitude, and specific range, are investigated. The dataset, obtained from Turkish Airlines, includes 4384 eligible flight data records of narr...

In this study, the effect of distance on fuel mileage (fuel burn per nautical mile) and CO2 intensity, based on a large amount of actual flight data, is discussed for narrow-body commercial aircraft performing domestic flights for flight distances of between ∼200 and ∼800 NM, in Turkey. For twenty-nine domestic routes, the average CO2 intensity is...

In this study, alternative trainer aircraft are evaluated and ranked according to the specific criteria. Analytic Network Process is used as the multi-criteria decision making method. Five alternatives are chosen among popular trainers all around the world. Six main criteria and twentytwo sub-criteria are determined, so the solution matrix consists...

Operational landing and takeoff standards developed by the International Civil Aviation Organization (ICAO) in the 1970s, have been widely-used in fuel consumption and emissions models or inventory studies. However, these generic standards may cause significant uncertainties due to changes in the air transport system over time and appear to remain...

This study presents an analysis of the seventeen complete measurements of gaseous emissions of eleven different CFM56-7B26 turbofan engines during the regular test-cell runs. A novel measurement setup is established in which the sample probe is located immediately behind the low pressure turbine rotor. Recording a total of 49,190 data points for 26...

From the point of view of the environmental impact of aviation, rather than fundamental strategies mainly intended for lower fuel consumption, and thereby less carbon dioxide emissions, more comprehensive approaches have emerged as climate optimized flight concepts, which promise potentially better strategies due to consideration of the tradeoff el...

In this study, the results of a test cell emission measurement campaign for overhauled CFM56-7B26 series engines are presented. The emissions are measured for specific power settings representing the main operating modes of aircraft, during the functional and performance tests of the engines. The measured emissions are carbon dioxide, carbon monoxi...

A chronology of the constant angle of attack-constant velocity cruise range estimation studies and events, specifically the Bré equation, is discussed. The Bré equation, which combines aerodynamics, propulsion in the form of specific fuel consumption and structural figures of merit of the aircraft, can be used as an objective function in aircraft d...

An exact solution of the maximum range, and a highly accurate approximate solution of the maximum endurance, are proposed for cruising flight of the piston-powered aircraft installed with a constant-speed propeller and cambered wing. It is proven that the constant-altitude/constant-speed cruise range can be independently optimized, even for the air...

Performance differences between the aircraft types are natural and they inevitably cause problems in the air traffic system, particularly when slower aircraft types are followed by faster types in a climb or cruise queue. This paper presents the excess fuel consumption impact of aircraft performance differences in the air traffic environment. For t...

Approximate cruise range solutions are introduced for the constant altitude – constant high subsonic speed flight of turbojet/fan transport aircraft with cambered wing design. The variation of the specific fuel consumption with Mach number is also considered in derivation of the approximate solutions. The method aims at estimation of the cruise ran...

Aerodynamic and propulsive modeling of current aircraft fleet is vital for Air Traffic Management applications, especially for use in decision support tools to predict aircraft trajectories and simulation tools. There are various models already in use or proposed. A different aerodynamic and propulsive modeling is presented in this paper. The new m...

The air traffic control system is changing due to implementation of automation systems to avoid congestion and to increase safety, efficiency, and economy of flights. Consequently, the nature of an air traffic controller's job is also changing. Therefore, knowledge requirements of air traffic controllers should be revised. In this article, we discu...

Air transportation has been suering for decades from delays caused by air trac congestion. This paper presents the eect of aircraft performance dierences on air trac delays. Rate of climb and cruising speeds of 70 dierent aircraft types are compared to demonstrate performance dierences in the current transport aircraft fleet. The eect of these perf...

Two different approximate solutions are proposed and compared with the numerical solution of the constant-altitude-constant-Mach-number cruise range for turbojet/fan aircraft. The approximate solutions consider both cambered wing drag polar and dependence of specific fuel consumption on Mach number. It is also proved that the classical analytical a...