The filename refers to a specific compressed archive segment of a pirated release of Aerofly FS 4 Flight Simulator by the scene group Razor1911 .
The actual game features, which you would access after successfully extracting all parts, include: Aerofly_FS_4_Flight_Simulator-Razor1911.part23.rar
: You cannot open "part23" individually. You must have all segments in the same folder and open "part01" or the ".exe" wrapper to begin extraction. The filename refers to a specific compressed archive
Because this file is associated with a "Razor1911" crack release: Aerofly_FS_4_Flight_Simulator-Razor1911.part23.rar
: Features a full multibody simulation and highly accurate ground physics.