Bocian
| Type designation | SZD-9 Bocian |
| Competition class | unclassified |
| Number built | 617 |
| Crew | 2 |
| Length | 8.2 m |
| Height | 1.8 m |
| Cockpit width | |
| Cockpit height | |
| Wingspan | 17.8 m |
| Wing area | 20 m² |
| Aspect ratio | 16.38 |
| Wing profile | NACA 43018A |
| Empty mass | 345 kg |
| Maximum mass | 540 kg |
| Wing loading | 27 kg/m² |
| Maximum speed | 200 km/h |
| Speed in rough air | |
| Stall speed | 60 km/h |
| Minimum sink rate | 0.82 m/s at 71 km/h |
| Best glide ratio | 26 at 80 Km/h |
| Roll rate |
Histoire:
The SZD-9 Bocian ("Stork") was designed by Marian Wasilewski, with Roman Zatwarnicki and Justyn Sandauer as a multi-purpose two-seat sailplane capable of fulfilling the needs of every area from training to competition flying.
The prototype SZD-9 flew for the first time on 10 March 1952 . An improved model was accepted for a production as SZD-9bis Bocian-1A (or simply "Bocian A"). The first serial glider flew for the first time on 13 March 1953 and 11 were built.
Variants:
- SZD-9 Bocian - prototype
- SZD-9bis Bocian-1A - the first variant, 11 built
- SZD-9bis Bocian-1B - improved variant (eg. bigger tailfin), 11 built
- SZD-9bis Bocian-1C - improved variant of 1954 (wings swept at lesser angle, modified control surfaces and rear skid), 40 built
- SZD-9bis Bocian-Z - modified competition variant for 1956 World Gliding Competition, 3 built (2 rebuilt of Bocian C)
- SZD-9bis Bocian-1D - improved variant of 1958 (bigger wheel and minor modifications), 186 built
- SZD-9bis Bocian-1E - modified trainer variant of 1967 (straight wingtips, two-part canopy instead of three-part, landing gear with shock absorbers), 366 built
Apart from use in Poland, the type was exported to 27 countries, including Austria, Australia, Belgium, China, France, Greece, India, Norway, FRG , Swiss, Tunisia, Turkey, Venezuela, United Kingdom, USSR.
(Source: wikipedia,sailplanedirectory.com)