The China Y-9 Transport Aircraft Solid Assembly Model consists of 197 solid part primitives collected into 29 sub assembly modules. Units for this model are in meters and fractions thereof.
All of my models are developed specifically for use by conceptual designers, experimenters, educators, students and hobbyists. The models are constructed from scratch employing scaling of publicly released simple 3 view drawings and experienced based assumptions. Although general representation is very good - detail accuracy and accountability can be compromised by this approach.