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Aircraft Design An Approach With Breguet Range Equation

This report is written for the NASA/DLR Design Challenge 2018 in order to design an Ultra Efficient Passenger Aircraft of the future. It will indicate, how the Breguet range equation can be used as a simple but significant model for the fuel consumption on transportation aircrafts. There is an increasing public, political and economic demand for reducing the fuel consumption for aircrafts. In order to meet this interest, this evaluation will present how Aircraft Design can make a contribution to this request. The parameters for aircraft performance depends mainly on the aerodynamics, propulsion system and the structure. All essential parameters will be considered in the Breguet range equation: the glide ratio (lift-to-drag ratio), the specific fuel consumption and the mass fraction. The Breguet range equation is discussed under the aspect of fuel consumption with the according fuel calculation. An example mission with a payload-range diagram for a midrange aircraft (like Airbus A320 or Boeing 737) is used to demonstrate the efficiency of this approach. Results will be verified with a constraint diagram and payload-range diagram with a preliminary design process.

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