The filename likely refers to a compressed archive containing digital content related to the Republic F-105 Thunderchief , a Cold War-era supersonic fighter-bomber nicknamed the "Thud".
: Digital guides for custom brick models (e.g., Brickmania Digital Instructions ) or reference materials for scale modelers. F105.7z
F-105D Thunderchief – Digital Building Instructions - Brickmania The filename likely refers to a compressed archive
To access the files inside, you must use an archiver that supports the 7z format. F105.7z