A simplified method for estimating the take-off weight for short-haul transports

Abstract

A new formula is presented for estimating the maximum take-off weight of an initial short-haul jet transport aircraft design in terms of its main specified mission characteristics: design payload, range and field length at sea level ISA. The formula is based on an approximation of numerical modelling results for designs optimised with respect to geometry, powerplant and aerodynamic characteristics. The method provides an accurate prediction of the take-off weight in the initial design phase and also allows evaluation of the take-off weight sensitivity with respect to changes in the specification.