A hundred years ago the Wright brothers performed the first flight ever on an airplane equipped with a piston engine. Old but gold, piston engines have certain advantages over small-sized turbine engines (provided the take-off power does not exceed 400 hp) from the economic, technical and ecological viewpoints. However, the number of factories producing piston engines around the world is limited. Russia has only one such factory, the Voronezh mechanical plant, a manufacturer of the M-14P engine for sport aircraft. Mass production of piston engines for extremely light aircrafts (like motor gliders, paraplanes) in Russia is absent. In a likelihood, only two or three years from now we might expect new models of piston engines to appear on the market. Admittedly, the market demand in piston engines is estimated at 3 to 5 thousands a year.