CPACS 2.1 is the second public release of CPACS. Most of the implementation was already included in CPACS 2.01
included fuselage structure and cabin definition
all data is defined according to the CPACS coordinate system. That is the initial coordinate system in which geometries are defined. Therefore, it can but must not meet your body axis.
the mass breakdown is extended for a more detailed wing structure
profiles can now be included based on a two-dimensional class shape transformation. The old parametrization will still be available. TIGL will learn CST asap.