Abstract: Method and apparatus for generating a solid model of a structural assembly, or solid models of components of such assembly, according to cross sectional shapes of the components and attributes associated with the cross sectional shapes, wherein the components are initially defined by wire frame models or surface models represented by suitable shape data such wire frame data. When a structural assembly is modified in design, the shape data are changed, and the corresponding cross sectional shapes and attributes are changed, so that a modeller modifies the already generated solid model or models, on the basis of the changed cross sectional shapes and attributes. The apparatus includes part data files for respective structural assemblies, and each part data file has component data files for respective components of each assembly, and a relation data file storing component relation data representative of positional relationship of the components of the assembly.

Abstract: A toy glider assembly is disclosed. The glider includes a fusilage, vertical stabilizer, and horizontal stabilizer. Wings are received in wing receiving members which are pivotably connected to a main wing support housing which in turn is pivotably connected to the fusilage. Pivoting the main wing support housing and the wing receiving members results in the wings being longitudinally aligned with the fusilage. A force imparting member is operative between the fusilage and the wing receiving members urging a force for emplacing the wings in their flight orientation with respect to the fusilage. A slignshot-like catapult serves to launch the glider assembly. In launching, the wings are held in longitudinal alignment with the fusilage and will open into flight orientation when the glider reaches its upper launch height.