1. Department of Aircrafts and Aircraft Engines , Rzeszow University of Technology , Powstańców Warszawy Av. 8, 35-959 Rzeszow , Poland , tel.: +48 17 8651466 fax: +48 17 865 1942
2. MTU Aero Engines Poland , Tajęcina 108, 36-002 Tajęcina , Poland , tel.: +48 17 771 04 82, e-mail: robert.jakubowski@mtupolska.com