A procedure has been established for the utilization of a computer to calculate coordinates of curves described by the second degree equation as used in defining the shape of aircraft components. Based on the same preliminary sketches and input data used in the graphical method of development, longitudinal basic lines and transverse contours can be quickly calculated to describe an entire three dimensional surface. The output data are utilized for currently established three dimensional mock-up techniques and hardware design.The paper presents the mathematical background and a complete explanation of the procedure used to develop a three dimensional surface. Design optimization, hardware design, and utilization of supplementary information are discussed. Appendices include the general computer program and a sample design problem.