V.I. Biryuk - Ph.D. (Eng.), Moscow Institute of Physics and Thechnology; Chief Research Fellow; Central Aerohudrodynamic Institute. E-mail: v_biryuk@yahoo.com
Nguyen Hong Phong - Post-Graduate Student, Moscow Institute of Physics and Thechnology. E-mail: loicuagio100884@yahoo.com

V. I. Biryuk - Ph.D. (Eng.), Associate Professor, Lecturer, Department of Aircraft Strength, Moscow Institute of Physics and Technology (State University), Chief Research Scientist, Central Aerohydrodynamic Institute. E-mail: v_biryuk@yahoo.com
H. Ph. Nguyen - Post-graduate Student, Department of Aeromechanics and Flight Engineering, Moscow Institute of Physics and Technology (State University). E-mail: loicuagio100884@yahoo.com