Biser

Autre nom (ou nom en langue originelle) : Бисер
DONNÉES GÉNÉRALES
Année du premier vol
(ou de design, si seul projet)
1964
Pays Bulgarie
Designer(s) PANCHOWSKI & KANEV & WARSAME & VLAYCHEV
Premier constructeur DOSO Workshop
Type d'appareil Planeur
Fonction Entraînement

SPÉCIFICATIONS TECHNIQUES
Envergure 12.25 m
Longueur 5.87 m
Hauteur 1.48 m
Allongement12.35
Surface alaire12.15 m2
Profil aile--
Masse à vide156 kg
Masse maxi246 kg
Charge alaire20.25 kg/m2
Vitesse mini--
Vitesse maxi200 km/h
Finesse maxi20 à 78 km/h
Taux de chute mini--
Nb sièges1
StructureStructure bois recouvrement contreplaqué.

[Photo d'origine inconnue]
[via Airwar]

AUTRES INFORMATIONS

Constructeur(s)
ConstructeurConstruits
DOSO Workshop34
Nombre total de constructions34
Infos techniquesThe glider's high positioned rectangular wing was strutted. The tail unit had a T arrangement. The landing gear consisted of a nose skid, a main wheel and a tail skid. Instruments in the cockpit allowed to fly in bad weather. Its cabin was comfortable and had excellent visibility. Air brakes were very effective. The glider was tested in aerobatics.
Histoire résuméeFor transition from two-seaters training gliders "Pioneer", "Jastreb" and "Gerav " UR-1 Grunau Baby 2A had been used for many years. In the fifties glider production was on minimum level and only in 1963 was the Public design office charged with the development of a new single-seat training glider.
The prototype was completed in 1964. Tests were carried out in August. The tests revealed that the glider called "Biser" had excellent qualities. In 1965 the serial production of the glider "Biser" started in DOSO (in Bulgaria analogous with DOSAAF) workshop in the city of Mihaylovgrad. 34 gliders were produced, which replaced the UR-1.
In 1966 a "Biser-laminar" version was designed by the design office. A prototype was built. The fuselage was similar to the "Biser", however the wing had a laminar airfoil and flaps were fitted. This was the last glider built in the DOSO workshop. This glider was operated by the Central Flying Club at Bozhurishte. In 1969 all glider production was stopped in Bulgaria.
Liens personnalités Pas de personnalité associée.
RemarquesБисер (biser) = perle
Compléments docs

SOURCES DOCUMENTAIRES

Liens WEBSite : Airwar . Texte + 3 photos + plan 3 vues + specs. (2011-07-26 CL)
LivresPas de livre référencé.

MODÈLES RÉDUITS

Pas de plan ou kit référencé.
Fiche n° 2087 [Dernière mise à jour : 2011-07-27]