Moscow Aviation Institute (National Research University) (MAI; Russian: Московский авиационный институт, МАИ) is one of the major engineering institutes in Moscow, Russia. They have developed, or are developing, a range of general aviation aircraft. MAI-411 multi-purpose four-seat twin engine airplane has been designed according to AP—23 Aviation Rule requirements, analog of European CS—23 and American FAR—23. The following description is taken from the manufacturers website. Refer to this website for details of the other models by this manufacturer. The airplane is equipped with modern all-digital navigation complex for easy and safe flight operations in all operation modes. The standard crew and passenger seating is side-by-side in two rows. The cabin height is 1220 mm, crew and passenger seating area width is 1275 mm, which provides comfortable conditions of housing the people dressed in winter clothes. The cabin has ventilation and heating systems efficient within the whole range of operating conditions (-25...+40˚C). The luggage section is located behind the backs of the 2nd row seats. A vertical tail includes a fin integrated with a fuselage, and a rudder. A horizontal tail comprises a cantilever stabilizer and an elevator. Both stabilizer and an elevator are made one-piece tailplane by span, which lowers the weight and improves efficiency. Airplane have a tricycle landing gear with a nose wheel. The airplane has an ability of a float-type and ski landing gear mounted. A power plant includes two ROTAX 912S piston engines closed in engine nacelles and located on the wing symmetrically to the fuselage. The main fuel tanks are in the center-wing section. The airplane is of a double control. A pilot's seat is on the left.