PZL Bielsko SZD-55-1
| PZL Bielsko SZD-55-1 | |
|---|---|
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| Type: | Glider of FAI standard class |
| Design country: | |
| Manufacturer: | |
| First flight: |
August 15, 1988 |
| Production time: |
1987– |
The PZL Bielsko SZD-55-1 Promyk (German: Sonnenstrahl) is a single-seat high-performance glider. The gliding index is 106.
history
The SZD-55-1 is a high performance glider the default class , and was constructed 1987th Two prototypes were created, which flew for the first time on August 15, 1988 and January 3, 1989, respectively. In terms of its flight performance, it is roughly comparable to the Schneider LS8 roller shutter .
Two SZD-55s made their international debut at the 1989 World Gliding Championships in Austria, but, when flown by two Bulgarian pilots, were only able to occupy back places. Despite this bad start, Polish pilots with the pattern won the championships in Leszno and the European junior championships in Cambrai in the same year .
PZL Bielsko has stopped manufacturing gliders. It is currently being built by the Polish manufacturer Allstar PZL Glider Sp. Z oo under the name "Nexus".
construction
The middle decker is a pure GRP construction and has a very low empty weight of 215 kg due to its construction and manufacturing method. Nevertheless, a water ballast of 195 kg can be carried. An eight liter water ballast tank is located in the tail of the aircraft to precisely trim the aircraft for every flight condition. The wing weighs 55 kg and has automatic rudder connections.
The wing has an elliptical floor plan, which means that very little induced drag is achieved even without winglets . The profile is a modified NN-27.
The landing gear is retractable.
Flight practice
SZD 55-1 is particularly characterized by its low set-up weight, which enables quick set-up and dismantling. It is also possible to fill the areas with 180 liters of water ballast. The rear tank to balance the center of gravity is only to be used with the flat tanks. A disadvantage of the low weight is particularly evident without water ballast, as the aircraft then becomes too light to be able to fly out its glide ratio at high speeds.
With a glide ratio of 43 to 44, the SZD-55 offers good conditions for demanding gliding.
Technical specifications
| Parameter | Data |
|---|---|
| constructor | Tadeusz Labuc |
| crew | 1 |
| span | 15.0 m |
| Hull length | 6.85 m |
| Torso height | 1.47 m |
| Wing area | 9.60 m² |
| Wing extension | 23.44 |
| Glide ratio | 44 at 119 km / h |
| Slightest sinking | 0.68 m / s at 100 km / h |
| Empty mass | 215 kg |
| payload | Max. 285 kg |
| Max. Takeoff mass | 500 kg |
| Top speed | 265 km / h |
| Stall speed | 84 km / h at 500 kg |
| Max. Load factor | + 5.30 / −2.65 g |
Web links
- Manufacturer's website (German, English and French)
- German info page
- RC-Modeling & Polish Sailplanes - Extensive information about Polish gliders
Individual evidence
- ^ H. Book: SZD-55 - a new high-performance glider from Poland. In: Fliegerrevue No. 2/1990, pp. 42–44