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VTC Delfin
The VTC Delfin is a competition single seat Standard class glider designed and built in Yugoslavia in the 1960s. It had some success in national competitions and went into small scale production.
==Design and development==
A standard class single seat sailplane with a wooden structure and largely plywood covered, the Delfin has a 15 m span (49 ft 2.5 in) shoulder mounted wing of straight tapered plan and with small tip fairings or salmons. There is 2° of dihedral. Forward of the spar the wing is wooden skinned; the first seven aircraft, the Delfin 1, use ply-foam sandwich but this was replaced with all-wood layers in the production Delfin 2. Behind the spar the covering is fabric. The Delfin 1 has metal ailerons, replaced with all-wood ones in the Delfin 2. No flaps are fitted but there are Schempp-Hirth airbrakes mounted at 60% chord.〔
The oval cross-section fuselage of the Delfin tapers gently to the rear to an integral fin. All Delfins were built with a fin and rudder strongly swept on both leading and trailing edges and with an all-moving tailplane, fitted with servo tabs, mounted on the fuselage. Four Delfin 2s were later modified into Delfin 3s with a more upright vertical tail and a fin-mounted fixed tailplane with conventional elevators. The Delfin cockpit is long, with the pilot seated in a semi-reclining position. On Delfin 1s, it is covered by a long, forward sliding, single piece canopy reaching almost to the nose but later marks have a shorter, starboard hinged one piece canopy, with the upper nose surface plywood skinned like the rest of the fuselage. The undercarriage consists of a fixed, unsprung, semi-protruding monowheel and a small tail bumper. A rubber spring nose skid was added to the Delfin 2.〔〔
The Delfin first flew from Vrsac in December 1963.〔 The Delfin 2 was produced there, making its first flight on 26 April 1965. The Delfin 3 followed on 29 July 1968.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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