ESA, EA and several European space companies (EADS, Snecma, Avio,…) have begun a project to create a set of standard propulsion libraries in EcosimPro. They will be used as ESA standard libraries to create propulsion models for satellites and Ariane-5 in Europe. Some of these libraries are turbomachinery (inducers, compressors, turbines,…), thermal (heat exchangers,…), tanks (surface tension propellant tanks, diaphragm/bladder tanks,…), fluids (with two phase phenomena), and mechanical (shafts, gear boxes, inertia and Spring stiffness,…).