1. Faculty of Aerospace Engineering, University POLITEHNICA of Bucharest, Splaiul Independentei 313, 060042, Bucharest, Romania and INCAS – National Institute for Aerospace Research “Elie Carafoli”, B-dul Iuliu Maniu 220, Bucharest 061126, Romania, ing.stroe@yahoo.com
2. Faculty of Aerospace Engineering, University POLITEHNICA of Bucharest, Splaiul Independentei 313, 060042, Bucharest, Romania and INCAS – National Institute for Aerospace Research “Elie Carafoli”, B-dul Iuliu Maniu 220, Bucharest 061126, Romania, costea.mihaela@incas.ro