: The win86 (a variation of x86) suffix is common in older Windows drivers or utility software for industrial hardware.
If you are looking for a "detailed paper" associated with this file, it is likely a or a research report on aerodynamic grid fins. I recommend searching for broader terms such as: "Aerodynamic characteristics of grid fins" "MISL3 software user guide" "Grid fin wind tunnel test data" Download grdfins802win86 rar
: The "grdfins" prefix frequently refers to Grid Fins , which are lattice-style aerodynamic control surfaces used on missiles and SpaceX rockets. The file might be a Windows-compatible executable or dataset for simulation software like MISL3 or proprietary CFD (Computational Fluid Dynamics) tools used in aerospace engineering. : The win86 (a variation of x86) suffix