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The Ikarus Košava ((英語:North Wind)) is a two seat sailplane designed and built in Yugoslavia in the early 1950s. It won the 1954 World Gliding Championships in the two seat category and came second in the same event two years later. ==Design and development== The Košava was commissioned by the Yugoslavian Aeronautical Union and built at the Ikarus factory to replace the pre-World War II Kranich II aircraft. It is a wooden glider, covered in a mixture of plywood and fabric. The wings are built up around single spars, with ply covering to the leading edge forming a D- or torsion box. Behind the spar the covering is fabric. Forward sweep of 4.5° at one quarter chord allows the centre of gravity to be far enough forward to place the rear of the two tandem seats at it and the leading edge. The wing is of gull wing design, the roots at the shoulder wing position and with 7° of dihedral on the inboard 40% of span. A subsidiary spar carries plain flaps inboard, mass balanced and sealed ailerons, divided into two sections, outboard. The first prototype had a pair of under surface airbrakes on each wing but these were replaced on the second aircraft with Schempp-Hirth parallel ruler action brakes.〔 The flaps on the Košava could be set to downward or upward deflections. For slow fight they were lowered through either 15° or 30°. The ailerons automatically drooped when this was done: 15° of flap drooped the inner ailerons 10° and the outer ones 5°, 30° of flap produced 15° and 10° of droop. The wing section without flaps was a high camber one best suited for high lift at low speed but raising the flaps through either 6° or 9° lowered the camber. 6° increased the speed and 9° made the glider autostable in pitch, particularly valuable for blind flying in cloud.〔〔 The semi-monocoque fuselage is ply covered and oval in cross section, becoming finer and more circular towards the tail. the fixed rear surfaces were also ply covered, carrying fabric covered control surfaces. The horizontal tail has almost constant chord and is forward of the rudder, which is broad and extends down to the keel. The fuselage deepens forward, with a fixed skid for landing, aided by a tail bumper The Košava was launched on a drop-off wheeled dolly. The tandem cockpit has a long, low, level topped multi piece blown canopy which extends aft to about mid-chord where it is faired into the fuselage. The Kosawa first flew in March 1953.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ikarus Košava」の詳細全文を読む スポンサード リンク
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