Conceptual Design of a 70 Passenger Airliner Propelled by Fuel-Efficient TurbofanEngines

摘要

The conceptual design process of a regional transport airliner, intended to carrya design pay-load of 70 passengers plus baggage over a distance of 2500 km, is described. Different aircraft are designed to allow a discrete variation on the primary design variable, which is the wing aspect ratio. To limit the amount of changes in the overall aircraft design, it was decided that the fuselage and tail design should be the same under variation of the aspect ratio. Also, the wing design will be different for the 6 designs and wing position might vary as well. The aircraft is to be optimized for maximum range and direct operating cost. In the design procedure, the maximum take-off weight will be kept constant. Finally, the wing area should be constant as well, which implies a certain constant wind loading has to be chosen for the family of 6 designs. Different optimum aspect ratios for maximum range and DOC are derived.