Igor, if you ever want to make the wings the way Wojtek has shown, you could use litho printing plates. Local printers might have some scrap plates they would let you have. The ones used on small-offset printing presses are normally thin and flexible, especially if they are of the type known as 'Diffusion Transfer' plates, such as the Kodal PMT or the Agfa DT plates. These can be cut and worked easily, using only normall scissors or a work knife, and they will bend and conform well. If you can't get any, and would like some, let me know. I still have a few about 34 x 25 cms, and could send you two or three to try.