1. Industry of Turbopropellers S.A.U., Advanced Engineering Direction, 28168 Madrid, Spain
2. Center of Aeronautical Technologies, Fluid Dynamics Center, 48170 Zamudio, Spain
3. Avio Aero, Engineering Technologies, 10040 Torino, Italy
4. Coquetdale Engineering Consultancy Ltd., Morpeth, England NE65 7EZ, United Kingdom