Aircraft trip DOC parameters: A function of stage length, seat capacity and design range

In order to directly and quantitatively reflect the intrinsic relationship between aircraft direct operating costs (DOC) and seat capacity and design range, a new DOC calculating model for civil airplanes is presented based on seat capacity, design range and flight length. Firstly, NASA 97 method on 20 specific aircraft types over any mix of flight lengths is used for generating aircraft DOC samples, which is presented by National Aeronautics and Space Administration of US in 1997. Secondly, the functional form between DOC and flight lengths is determined by the generated samples above, and then the model´s coefficient estimations are regressed out. Thirdly, this calculating model´s function is presented by analyzing each regression coefficient´s variation linked to seat capacity and design range. Fourthly, the ordinary least square (OLS) method is used for estimating the regression function´s coefficients. Finally, the paper verifies the feasibility of proposed model.