Elitar-Sigma aircraft is designed in full conformity with the USA FAA regulations for light sport airplanes and is intended for instructional and training flights, patrolling of forestlands, fields and fishing areas in order to protect them against poaching, for patrolling along power transmission lines, oil and gas pipe lines to monitor their condition, for air photosurveying, for aerotourism, private business travels, hunting and fishing.

  The aircraft is a semi-cantilever high-wing monoplane of conventional design with nose top-mounted power plant. Design feature of Elitar-Sigma is missing of fuselage in its ordinary sense. Primary structural members of this aircraft are upper and lower beams fastened to each other by center-line pylon and forward strut. Outer wings, empennage, engine and cockpit are attached to the upper beam. Aircraft operating controls, engine controls, pilot seats and fuel tank are attached to the lower beam.

  Single-spar wing of rectangular planform is equipped with slotted flaps and drooped ailerons. The structural frame of the outer wings is metal; the skin is composed of three-layered glass-fiber panels with plastic foam filler. Flaps are also of glass fiber. Ailerons consist of metal structure with a profiled leading edge of glass-fiber and a fabric skin impregnated with aircraft dope.

  Cantilever empennage is of conventional design. Stabilizer and fin have all-metal construction. Framework of control surfaces is metal, riveted, and the skin is made of fabric. The elevator is mass-balanced. False fin with a tail bumper is mounted on the underside of the longitudinal beam.

  There are two oval doors on the left and right sides of the closed two-seat cockpit. These doors are fitted with big oval-shaped convex non-bound windows ensuring very good vision range. The doors open outside up. In the front part of the cockpit a non-bound windshield glazing is mounted. Two oval-shaped non-bound windows are fixed on the rear left and right sides.

  Pilot seats are placed side-by-side, and the primary pilot seat is on the right. Seat backs are made adjustable and reclining, they can be folded forward and easily removed if necessary. Behind the seat backs there is a flat fuel tank separated from the cockpit by a special casing. Upper surface of this casing is a baggage hold. Behind the right seat the parachute fast-acting escape system BPS K-600 is installed.

  Aircraft control system is dual and comprises two control sticks and two pedal units. The pedals can be adjusted for pilot’s height. Control linkage is rigid for pitch and roll channels. For yaw channel it is a control cable.

  The landing gear is tricycle non-retractable spring-type with a nose wheel. Main wheels are equipped with hydraulic brakes with mechanical cable control run. The nose wheel is steerable, it is pedal-controlled through cable run. The aircraft design and instrumentation allow to carry out flights in daylight hours according to visual flight rules (VFR).

  This aircraft can be operated in all climatic zones within the temperature range -35 to +40 °C. Elitar-Sigma can be additionally equipped with ski or float-type landing gear.