VSB-66 Orlice (oz16912)

About this Plan

VSB66 Orlice. Radio control scale model glider. Wingspan 2735 mm.

Quote (google-translated): "We present a replica of a virtually unknown glider, only two of which were built in the mid-1960s. VSB-66 Orlice.

The VSB-66 'Orlice' (meaning Eaglet) was developed in the mid-1960s by a team of six aeronautical engineering students at the Military Academy in Brasov, Czechoslovakia. Under the direction of engineers R Pospisil and M Forjet, the foundations were laid for the construction of two prototypes, and actual construction began in 1966 at Orlican Chocen.

The first model was flight tested on September 17, 1970, while the second followed a year later. This model, after an initial testing phase, was used by various flying clubs, most recently by the one in Trnava. There, for a still unclear cause (probably a spin), the Orlice crashed from an altitude of approximately 1,400 meters, killing the pilot instantly. The surviving aircraft, serial number OK 1900, is currently on display at the Kbely Aviation Museum in Prague.

The Model: Among the distinctive features of this glider, constructed entirely of wood, is the unusual choice of a fully mobile V-shaped tail (pendular) with a very narrow sweep angle: only 90° compared to the 100-110° commonly used. The model we present has a wingspan of 2,735 mm, making it ideal for slope soaring.

The construction is traditional, with a ribbed wing (Selig 7055 profile) and a fuselage with frames and stringers, covered in 3 mm balsa and glass cloth.

The frames, in 3 mm balsa and 2 m plywood, are on pages 67 and 68. As for the wing, the Kl-K32 ribs are in 1.5 mm plywood, while the K4-K22 are in 1.5 mm balsa, obtained with the classic package method. The tailplanes adopt a NACA 63A012 profile at the root, which evolves into..."

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