The fuel tanks on the aircraft as such was not just in the wing provided two of the sealed compartment that served as fuel tanks.
In the future, when working on the next modification — su-26M, has returned to the traditional ribs in the wing structure. The fact that the first cars wing was although simple, sophisticated and durable, but somewhat heavier than required for a perfect aerobatic airplane.
Su-26M well as permanent, direct, two-spar wing composite structure with sixteen ribs: side — of the material D16T, end — of preorganisation, the rest of the truss, of titanium.
The front spar is of I-section, with shelves of unidirectional carbon and fiberglass. Between the shelves and glued the foam blocks and placeholders. The rear spar — channel, preorganisation. Of the same material with the honeycomb upper and lower skin panels of the wing. Two fuel tanks with a capacity of 82 l are placed at the root of the sock of the wing. To increase the autonomy of the aircraft, for example when driving to a new location, the fuel system is complemented by an outboard tank with a capacity of 100 L.
The first machines the ailerons were solid foam filler, fiberglass hull and box-shaped spar with shelves made of CFRP. The su-26M, however, abandoned this design in favor of the Aileron, which consists of metal ribs and spar with a shell of five glued layers of fiberglass. Fasteners such plating is one-sided.
The fuselage of the su-26, raano as the su-26M, truss, welded from high strength stainless steel pipes. This allowed the glaze almost all of its middle part around the cockpit. It should be noted that this gives the athlete an important tactical advantage, allowing him in any position of the plane to see the boundaries of the aerobatic zone marked on the ground with a white cloth: output from this area faces substantial penalty points.
The cabin is equipped with a new, not quite ordinary chair with a backrest angle of 45°, which provides optimal athlete position. This chair is easier to sustain g-forces encountered in flight, and they are considerable — from +11 to -9 units.
In the equipment of the cabin, picked with the wishes of the leading athletes-only pilots in the country, includes altimeter, airspeed indicator, clock, as well as a set of standard instruments to control the operation of the power plant. The radio equipment of the aircraft — portable radio station “breeze”. All electric appliances are powered by a small battery with a capacity of 3.6 Ah.
The fuselage skin is made of three-ply fiberglass panels with foam filler. The contour panel, edged with aluminum. To access the units and sites of the fuselage any panel can be removed in just a few minutes. Not too difficult to detach the wing — the lower nasal part of the farm of the fuselage removable.
The Elevator control and the Aileron is rigid rods, the rudder — ropes. Foot controls — overhead type, with hydraulic control valves brakes, located on pedal.
Powerplant traditional machines of this type is nine radial engine M-14P air cooled packaged screw with automatically variable pitch of two types — either Soviet two-IN-530ТА-D35, lobed or West German company Hoffman.
Chassis su-26M su-26 — fixed gear, a spring, an elastic element made of titanium alloy. Brake hydraulic, disc. The tail wheel is controlled associated with the rudder two spring rods.
The hinged part of the lamp, smoked glass, framed welded tubular titanium frame. On the front of the flashlight is adjustable ventilation intake.
As already mentioned, the new machine was created in accordance with the performance requirements of the USSR team, and in its construction also implemented most of the suggestions of “collections”. In the end, the su-26 has taken a liking to leading athletes of the country. In autumn 1984, the first two cars participated in the world championship in aerobatics, which took place in Hungary. Cool places they took, which, however, naturally — and the car has not yet been reported, and the pilots not fully familiar with the technique having several other aircraft performance data. However, the impact debut was encouraging, and the results gave the possibility to introduce changes in the design of the aircraft, and a method of training.
And finally, a great success. At the XIII world championship in aerobatics, held last summer in England, the Soviet team playing in the su-26M won the Cup named after P. Nesterov, and 16 medals, including 11 gold. While L. Nemcova won the title of absolute champion, and Vladimir Smolin and N. Nikitiuk became world Champions. Great interest was aroused by the demonstration of the aircraft and at the 37th International salon of aviation and space technology in Bourges.
These achievements are a tangible evidence of prospects of the chosen direction of designing aerobatic aircraft. The work on further improvement of the su-26M, an improvement of its aerodynamic and flight characteristics continues.
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