Let LF-109
| LET LF-109 Pionýr | |
|---|---|
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|
|
| Type: | Glider |
| Design country: | |
| Manufacturer: | |
| First flight: |
March 1950 |
| Production time: |
1950– |
| Number of pieces: |
470 |
The LF-109 Pionyr is a glider designed by Vladimír Štros from the Czech manufacturer LET.
It was planned as a training two-seater and had its maiden flight (as a prototype XLF-109) in March 1950. The aircraft was a simple and robust construction consisting of a fabric-covered tubular steel fuselage and a wooden control and supporting structure with good flight characteristics. A total of about 470 pieces were built, with further modified copies (all-metal construction and known as KAI-12 "Primoryez") also being produced under license in the Soviet Union from 1957.
38 LF-109s were exported to the GDR from 1953 and were used there by the GST for beginner training until 1965 .
Technical specifications
| Parameter | LF-109 Pionyr | KAI-12 Primoryez |
|---|---|---|
| crew | 1-2 | |
| length | 7.77 m | |
| span | 13.47 m | 13.42 m |
| height | 1.64 m | 2.36 m |
| Wing area | 20.20 m² | |
| Wing extension | 9.03 | 8.9 |
| Wing profile | NACA 43012 | |
| Wing loading | 21.78 kg / m² | 21.4 kg / m² |
| Glide ratio | 18.5 at 80 km / h | 17.5 at 72 km / h |
| Slightest sinking | 1.06 m / s at 62 km / h | 1.29 m / s |
| Preparation mass | 235 kg | 253 kg |
| Takeoff mass | Max. 440 kg | 433 kg |
| Top speed | 120 km / h | 140 km / h (aircraft tow) 100 km / h (winch tow) |
| Minimum speed | 52 km / h | k. A. |
literature
- FliegerRevue . No. 5/2008 , p. 67 .
- Hartmut Buch: Gliding . Transpress, Berlin 1980, p. 176/177 .
Web links
Commons : Let LF-109 - collection of pictures, videos and audio files
Individual evidence
- ^ Heinz A. F. Schmidt: KAI-12 "Primorjez". In: Soviet planes. Transpress, Berlin 1971, p. 187.
- ^ Detlef Billig, Manfred Meyer: Airplanes of the GDR. TOM Modellbau, Friedland 2002, ISBN 3-613-02198-6 , p. 15.
