Tukan - Design Description

Wing is based on the Wortman FX-63-137 airfoil, wingtips are equipped with winglets. Basic element of the construction is a plywood, box section beam and ribs made from spruce scantlings. Front part of the ribs is made from expanded polystyrene. Leading edge of the wing is covered by plywood and forms a torsion box. Polyester fabric covers trailing part of the wing. On the upper part of the wing are located hinged aerodynamic brakes. Wooden construction ailerons are also covered by a polyester fabric. They are operated via Dural tube rods. Wings are supported by shaped struts. Wing is fixed to the fuselage by mountings located on the wing beam and on the trailing edge section.

Fuselage, including the tail fin, is formed from a fiberglass monocoque. Monocoque is reinforced by plywood ribs. Ribs are utilized as wings, struts, undercarriage wheels and engine mountings. Engine bay is encased by a removable cover.

Cockpit (closed type) is covered by a one-piece canopy made from a splinter-proof polycarbonate (Makrolon). There are two ventilation windows on the side of the canopy. Control sticks are classic style type. The cockpit is equipped with following controls: engine throttle and choke, trim handle, aerodynamic brakes lever and propeller retraction handle. The cockpit is ventilated via air outlets.

Fixed undercarriage consists of the two main unsprung wheels (outer radius 400mm) and uncontrollable tail wheel. The main wheels are fitted with disk brakes. The brakes are operated via a cycle brake levers, mounted on the front seat control stick.

Tail surfaces are "T" shaped. Horizontal tail surfaces have similar construction as the wing and use modified Wortman FX-71-L-150/30 airfoil. The stabilizer position can be controlled via the trim handle.

Controls and instrumentation. The plane is equipped with one instrument panel, containing following instruments: airspeed indicator, combined electronic altimeter/variometer, compass, bank indicator, RPM gauge and engine temperature gauge.

System of controls. Ailerons, elevator and elevator trim are operated via rods, equipped with swiveling joint ends. Levers are fitted with the ball bearings. Rudder is cable controlled. Aerodynamic brakes are also cable controlled, in combination with springs.

Power unit is based on the Rotax 447 engine, equipped with electric starter and special belt reducer. Propeller can be lifted or retracted into the fuselage during the flight.