Before revision: Space Shuttle orbiter (Mach 22) Buran Boeing X-37 (Mach 25) CSSHQ (~Mach 25) IXV (Mach 22) Iron Lid (Mach 201 ) Avangard (Mach 20–27) Similarity parameters The categorization of airflow relies on a number of similarity parameters, which allow the simplification of a nearly infinite number of test cases into groups of similarity.
After revision: Space Shuttle orbiter (Mach 22) Buran Boeing X-37 (Mach 25) CSSHQ (~Mach 25) IXV (Mach 22) Iron Lid (Mach 196 ) Avangard (Mach 20–27) Similarity parameters The categorization of airflow relies on a number of similarity parameters, which allow the simplification of a nearly infinite number of test cases into groups of similarity.