The PZL Bielsko SZD-30 is a model of Polish glider, produced by the PZL Bielsko company. Here's a detailed overview of what is known about the SZD-30:

### General Information:
- **Type:** Single-seat sailplane (glider)
- **Manufacturer:** PZL Bielsko (Poland)
- **Model Name:** SZD-30 "Pirat"
- **Role:** Standard Class glider, primarily used for training and sport flying.

### Design and Development:
- The SZD-30 was developed in Poland by the well-known glider manufacturer PZL Bielsko, part of the SZD (Szybowcowy Zakład Doświadczalny - Glider Experimental Works).
- It was designed as a successor to earlier SZD models, focusing on improved performance and handling characteristics suitable for club and training use.
- The "Pirat" nickname translates roughly to "Pirate" in English.
- It belongs to the Standard Class, meaning it has a maximum wingspan of 15 meters and no devices like flaps for glide path control.

### Technical Specifications:
- **Wingspan:** Approximately 15 meters
- **Length:** Approx 6.4 meters (varies slightly by variant)
- **Wing area:** Roughly 11.6 square meters
- **Aspect ratio:** Around 19.8
- **Empty weight:** About 215 kg
- **Max takeoff weight:** Around 360-370 kg
- **Structure:** All-metal construction, often with fabric-covered control surfaces. In some versions composite materials were introduced.
- **Landing gear:** Typically a retractable main wheel with a skid or tail wheel.

### Performance:
- **Glide ratio:** Around 38:1 (a decent figure for a standard class glider of its generation)
- **Minimum sink rate:** Approximately 0.6 to 0.7 meters per second
- **Stall speed:** Around 60 km/h
- **Maximum speed:** Approximately 250-270 km/h

### Usage:
- The SZD-30 was widely used by gliding clubs across Poland and many other countries.
- It was appreciated for its forgiving handling and robust construction, making it suitable for training use but also capable in intermediate cross-country soaring.
- It gained some popularity in the 1970s and 1980s in Eastern Europe and other regions with active gliding communities.

### Variants:
- Several variants of the SZD-30 "Pirat" were produced, including versions with improved cockpits, minor structural changes, and different instrumentation options.
- A two-seater derivative or trainer version was sometimes mentioned in discussions but is not a widely produced variant.

### Legacy:
- The SZD-30 "Pirat" is considered one of the classic Polish gliders, emblematic of the era of wooden and early metal standard-class sailplanes.
- Many remain operational today in gliding clubs or private ownership, often restored and maintained by enthusiasts.
- It contributed significantly to Polish glider design heritage, influencing later models like the SZD-50 Puchacz.

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