1.7 Airframe
1.7.1 Wing
The wing is constructed of a central light alloy torque box; an aluminum leading edge with integrated fuel tank is attached
to the front spar while flap and aileron are hinged to rear spar. Flaps are constructed of a center spar to which front and rear
ribs are joined; wrap-around aluminum skin panels cover the flap structure. The aileron is constructed of an aluminum spar
to which a formed sheet metal leading edge and metal ribs are attached; a wrap-around. Aluminium material covers aileron
structure.
1.7.2 Fuselage
The front part of the fuselage is made up of a mixed structure: a truss structure with special steel members for cabin
survival cell, and a light-alloy semi-monocoque structure for the cabin's bottom section. The aft part of the fuselage is
constructed of an aluminum alloy semi-monocoque structure. The engine housing is isolated from the cabin by a stainless
steel firewall; the steel stringers engine mount is attached to the cabin's truss structure in four points.
1.7.3 Empennage
The vertical tail is entirely metal: the vertical stabilizer is made up of a twin spar with load carrying skin while the rudder
consists of an aluminum torque stringer connected to light alloy ribs and skin. The horizontal tail is an all-moving type
(stabilator); its structure consists of an aluminum spar connected to ribs and leading edge; the entire structure is covered
with aluminum material.
1.7.4 Flight controls
The control surfaces are manually operated using a control stick for ailerons and stabilator and rudder pedals for the rudder;
longitudinal control acts through a system of push-rods and is equipped with a trim tab. Aileron control is of mixed type
with push-rods and cables; the cable control circuit is confined within the cabin and is connected to a pair of push-rods
positioned in the wings that control ailerons differentially. Aileron trimming is carried out on ground through a small tab
positioned on left aileron.
Flaps are extended via an electric servo actuator controlled by a switch on the control stick. Flaps act in a continuous mode;
a panel mounted indicator shows surface position. A fuse positioned on the right side of the panel protects the electric
circuit.
Longitudinal trim is performed by a small tab positioned on the stabilator and controlled via an electric servo actuator by
pushing an Up/Down push-button located on the control stick.
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