The LAPCAT A2 Hypersonic Aircraft Solid Assembly Model is a concept offering from European company Reaction Engines Limited (REL). This machine is capable of delivering 300 pax from Brussels to Sydney in 2-4 hours - traveling at velocities in the Mach 4-5 category.
LAPCAT's "Sabre" propulsion system is liquid hydrogen based with air-oxygen cooling, a development of a consortium led by REL.
This model consists of 376 solid primitives collected into 38 sub assembly objects. Please note the .stp format version is 1/30 scale.