Abstract: The present invention provides an aircraft having variable airframe geometry for accommodating efficient flight. The aircraft includes an elongated fuselage, an oblique wing pivotally connected with said fuselage, a wing pivoting mechanism connected with said oblique wing and said fuselage, and a brace operably connected between said oblique wing and said fuselage. The present invention also provides an aircraft having an elongated fuselage, an oblique wing pivotally connected with said fuselage, a wing pivoting mechanism connected with said oblique wing and said fuselage, a propulsion system pivotally connected with said oblique wing, and a brace operably connected between said propulsion system and said fuselage.

Abstract: Cartesian mesh generation is accomplished for component based geometries, by intersecting components subject to mesh generation to extract wetted surfaces with a geometry engine using adaptive precision arithmetic in a system which automatically breaks ties with respect to geometric degeneracies. During volume mesh generation, intersected surface triangulations are received to enable mesh generation with cell division of an initially coarse grid. The hexagonal cells are resolved, preserving the ability to directionally divide cells which are locally well aligned.

Abstract: A compact and portable coil inserting machine for binding stacks of sheets having a plurality of perforations along a first side edge. The machine includes a frame having a support surface configured to support a stack of sheets thereon. A power roller is rotatably mounted to the frame, and extends along at least a portion of the support surface to drive a helical coil through the perforations in the stacked sheets. The coil-inserting machine further includes at least one guide that is movably mounted to the frame, and shifts between first and second positions. The guide includes a first concave guide surface that abuts an opposite side edge of the stacked sheets when the guide is in the first position, such that the perforations in the stacked sheets form a curved passageway corresponding to the curvature of a first coil size.