PZL Bielsko SZD-48
| SZD-48 Jantar | |
|---|---|
|
|
| Type: | Glider |
| Design country: | |
| Manufacturer: | |
| First flight: |
December 10, 1977 |
| Production time: |
1977 to 1994 |
| Number of pieces: |
more than 600 |
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The PZL Bielsko SZD-48 Jantar ( German : Bernstein) Standard is a single-seat Polish high-performance glider made of GRP , which was originally developed for the OSTIV standard class . The shoulder wing has a T-tail.
It is a further development of the PZL Bielsko SZD-41 Jantar Standard carried out by Wladyslaw Okarmus with a modified fuselage and the same wings. Between 1977 and 1994 more than 600 of both versions of the aircraft, which is still quite successful in the club class, were produced. The gliding index is 100.
Jantar Standard 2
The first flight of this version took place on December 10, 1977. Like the SZD-41 , it has a split hood and was manufactured until 1983. The canopy is not hinged and the rear part can only be removed, which is an unfortunate solution due to the lying position of the pilot after landing. The rigid and non-steerable tail wheel makes it difficult for the aircraft to move on the ground. The main landing gear is closed by a two-part landing gear flap. The cabin is not adequately ventilated. The fresh air inlets are located on the fuselage under the wings and fold inwards. Since the fuselage already tapers significantly towards the stern at this point, only very little fresh air is taken in from the opening, from where it is to be diverted to the front part of the cabin via air ducts. For the first time, there is therefore an additional flap that can be opened outwards in the sliding side window. The aircraft has no trim tabs. The rudder is trimmed by adjusting a return spring on the control stick. There is therefore no longer an emergency solution in the event of an elevator failure. The pilot probe on the vertical stabilizer has been changed several times. There are no skids on the wing tips to avoid damage during landing. The wing tips have a negative profile to reduce the wake vortices that inevitably occur there. When the winch is launched, ballast water cannot be carried. The rope coupling, which was also used for winch launch and was closed by two rubber lips in flight, was too far forward to enable a safe launch even with water ballast. That is why the clutch was modified in the GDR. In some cases an additional tow release was installed on the retractable landing gear. This brought several advantages. The aircraft could be started with water ballast on winches. It was also possible to choose a steeper angle of attack when the winch started. The typical Czech Herkules-3 and Herkules-4 winches in the GDR with their up to 180 hp Tatra motors were able to bring their motor power to full effect and achieve higher disengagement heights, even when towing the winch (about 100 to 150 m more height).
Technical data of the Jantar Standard 2
| Parameter | Data |
|---|---|
| Manufacturer | PZL Bielsko |
| crew | 1 |
| span | 15 m |
| length | 6.71 m |
| Wing area | 10.66 m² |
| Glide ratio | 40 (at 110 km / h 360 kg) |
| slightest sinking | 0.65 m / s (at 78 km / h, 360 kg) |
| Empty mass | 247 kg |
| Water ballast | Max. 150 l |
| Takeoff mass | Max. 520 kg |
| Top speed | 280 km / h |
| Minimum speed | 72 km / h |
| Wing loading: | 48.8 kg / m² with 520 kg take-off weight |
Literature sources
- Fliegerrevue 11/83 page 529
Jantar Standard 3
The first flight took place on February 9, 1983. The changes compared to the previous versions are the front-hinged one-piece canopy, a new, larger rudder and changes in the filling and draining of the ballast tanks.
Further developments based on the Jantar Standard are the Jantar K for the FAI 15 m class and the aerobatic SZD 59 Acro .
In the meantime, standard 2/3 winglets can be retrofitted to the Jantar , which greatly improves the flight characteristics, especially when circling ( thermal ).
Technical specifications
| Parameter | Data |
|---|---|
| Manufacturer | PZL Bielsko |
| crew | 1 |
| span | 15 m |
| length | 6.71 m |
| Wing area | 10.66 m² |
| Glide ratio | 40 (at 95 km / h, minimum payload) or 40 (at 123 km / h, maximum payload) |
| slightest sinking | 0.6 m / s (at 78 km / h, minimum payload) or 0.77 m / s (at 97 km / h, maximum payload) |
| Empty mass | 247 kg |
| Water ballast | Max. 150 l |
| Takeoff mass | Max. 540 kg |
| Top speed | 285 km / h |
| Minimum speed | 72 km / h |
| Maneuver speed | 200 km / h |
| Wing loading: | approx. 30 kg / m² to 50.5 kg / m² |
| Max. Load multiple | + 5.3 / -2.65 |
Web links
- Manufacturer's website (German, English and French)
- EASA-TCDS-A.041 (PDF; 147 kB) - Type certification of the SZD-48-3 "Jantar Standard 3"
- EASA-TCDS-A.446 (PDF; 109 kB) - Type certification of the SZD-48 "Jantar Standard 2" & "Brawo"