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DARcorporation developed an interactive, user-friendly windows based computer program to perform preliminary design and analysis functions for fixed wing airplanes. This paper shows the development of AGDA: Airplane Geometry Design Assistant, a program used to facilitate the geometric data transfer between analysis and CAD software. One major problem with the use of standard CAD programs is how to recognize different parts of the airplane in the analysis programs. Most routines need certain geometric parameters of the airplane e.g. wing span, fuselage length etc. An easier and user-friendlier method is to use an interface program between the analysis and the standard (commercially available) drafting program, which takes away the drawing instructions. In this way the user can concentrate on making the drawing without having to worry about how the program wants the different parts drawn.

DARcorporation developed an interactive, user-friendly windows based computer program to perform preliminary design and analysis functions for fixed wing airplanes. This paper shows a new development in presenting airplane geometric configuration data in a user-friendly manner. The ease of use will bring computer aided design and drafting methods to people previously not exposed to these methods because of the high amount of difficult computer and software knowledge needed.

A personal computer based preliminary design system for General Aviation aircraft demonstrates a practical method to design and analyze general aviation aircraft configurations. The program provides a powerful framework to support the non-unique process of aircraft preliminary design. The system will allow design engineers to rapidly evolve an aircraft configuration from weight sizing through detailed performance calculations, while working within regulatory constraints. The program is designed to reduce the preliminary design phase cost and to bring advanced design methods to businesses which normally do not have the computational and/or modern design/analysis capability.

A personal computer based preliminary design system for aircraft demonstrates a practical method to design and analyze any aircraft configuration. The program provides a powerful framework to support the non-unique process of aircraft preliminary design. The system will allow design engineers to rapidly evolve an aircraft configuration from weight sizing through detailed performance calculations, while working within regulatory constraints. The program is designed to reduce the preliminary design phase cost and to bring advanced design methods to small businesses and universities.

DARcorporation is developing an interactive, user-friendly computer program to perform preliminary design and analysis functions for fixed wing general aviation airplanes. The system allows design engineers to rapidly evolve an aircraft configuration from weight sizing through detailed performance calculations, while working within regulatory constraints. This paper shows the main features of the newly developed user interface for general aviation airplane design in a windows based environment. The ease of use will bring computer aided design methods to people previously not exposed to these methods because of the high amount of difficult computer knowledge needed.

A personal computer based preliminary structural design system has been developed for general aviation aircraft. Structural design is coupled with other elements of the preliminary design process to provide a unique and powerful framework for the preliminary design process. Capabilities include structural layout, structural weight sizing and detailed stress analysis. All of these can be applied to a number of built-in (and user defined) structural configurations. The program is designed to reduce preliminary design time and produce an efficient well-documented structural design that complies with regulatory specifications.