The request for "Download Aerostat Parseval rar" likely refers to a of a Parseval-type observation balloon.
: This site hosts a Parseval Aerostat model (designed by Fedor700) which includes three different scale variants. It provides templates and assembly diagrams for hobbyists. Download Аэростат Parseval rar
: While you are looking for a .rar file, the actual content will be images (JPG/PNG) or PDF templates that you print on cardstock. The request for "Download Aerostat Parseval rar" likely