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SZD-17X Jaskółka L

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(Redirected from SZD-17x Jaskółka L) Polish single-seat glider, 1956
SZD-17X Jaskółka L
SZD-17x in the Polish Aviation Museum
Role GliderType of aircraft
National origin Poland
Manufacturer SZD
Designer Jan Dyrek, Tadeusz Kostia
First flight 9 March 1956
Introduction 1956
Number built 4
Developed from SZD-14x Jaskółka M

The SZD-17X Jaskółka L was a single-seat high-performance competition glider designed and built in Poland at Szybowcowy Zakład Doświadczalny (Glider Experimental Works) in Bielsko-Biała in 1955.

Development

The SZD-17X Jaskółka L (Swallow Laminar) drew on the experience gained from developing the SZD-11 and SZD-14X gliders combined with new laminar flow aerofoil sections and flaps, as well as provision for water ballast and a fully retractable undercarriage. Main designer was Tadeusz Kostia, main constructor Jan Dyrek. Construction of the SZD-17X was of conventional wooden semi-monocoque fuselage and thick skinned wooden wings with wooden spars, retaining the Jerzy Rudlicki's butterfly tail of the SZD-14X. First flight of the SZD-17X took place at Bielsko airfield, flown by Adam Zientek, on 9 March 1956.

Four aircraft, (reg'n no.'s SP-1504 to SP-1507), were built for use in 1956 World Gliding Championships, but performance fell short of expectations and they finally were not used there. Despite the disappointing performance, Tadeusz Góra was able to establish a cross-country speed record on 9 May 1956 whilst flying SP-1506. SP-1506 was used until 1977, then it was given to the Polish Aviation Museum. The glider was nicknamed laminarka, due to its laminar flow profile.

SZD-17x SP-1506 showing its V-tail in the Polish Aviation Museum

Specifications (SZD-17X Jaskółka L)

Data from The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde

General characteristics

  • Crew: 1
  • Length: 6.8 m (22 ft 4 in)
  • Wingspan: 16 m (52 ft 6 in)
  • Height: 1.26 m (4 ft 2 in)
  • Wing area: 13.6 m (146 sq ft)
  • Aspect ratio: 18.8
  • Airfoil: NACA 652512a
  • Empty weight: 340 kg (750 lb) equipped
  • Max takeoff weight: 540 kg (1,190 lb)

Performance

  • Never exceed speed: 250 km/h (160 mph, 130 kn)
  • Aerotow speed: 140 km/h (76 kn; 87 mph)
  • Winch launch speed: 120 km/h (65 kn; 75 mph)
  • g limits: +7.9 -1.9 at 186 km/h (100 kn; 116 mph)
  • Maximum glide ratio: 31.2
  • Rate of sink: 0.8 m/s (160 ft/min) at 87 km/h (47 kn; 54 mph)
  • Wing loading: 39.7 kg/m (8.1 lb/sq ft)

Note: A. Glass quotes different specifications: maximum glide ratio 30.5 at 98 km/h; best sink rate 0.86 m/s at 93 km/h; wing loading 31.2 kg/m (40 with ballast).

See also

Aircraft of comparable role, configuration, and era

Related lists

Notes

  1. ^ "SZD-17x Jaskółka L (PL)". Archived from the original on 2009-08-21. Retrieved 2009-08-05.
  2. Simons, Martin (2006). Sailplanes 1945–1965 (2nd revised ed.). Königswinter: EQIP Werbung und Verlag G.m.b.H. ISBN 3-9807977-4-0.
  3. ^ Babiejczuk, Janusz; Grzegorzewski, Jerzy (1974). Polski przemysł lotniczy 1945–1973. Warsaw: Wydawnictwo MON.
  4. ^ "SZD-17X Jaskółka L". Retrieved 17 June 2013.
  5. Krzyżan, Marian (1983). Samoloty w muzeach polskich. Warsaw: Wydawnictwa Komunikacji i Łączności. pp. 139–140. ISBN 978-83-206-0432-0.
  6. ^ Glass, A. (ed) (1965), p.64-68
  7. Shenstone, B.S.; K.G. Wilkinson; Peter Brooks (1958). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs dans Le Monde (in English, French, and German) (1st ed.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp. 124–128.

References

  • Shenstone, B.S.; K.G. Wilkinson; Peter Brooks (1958). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs dans Le Monde (in English, French, and German) (1st ed.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp. 124–128.
  • Piechowski, Piotr. "SZD-17x Jaskółka L". Retrieved 17 June 2013.
  • Krzyżan, Marian (1983). Samoloty w muzeach polskich. Warsaw: Wydawnictwa Komunikacji i Łączności. pp. 139–140. ISBN 978-83-206-0432-0.
  • Babiejczuk, Janusz; Grzegorzewski, Jerzy (1974). Polski przemysł lotniczy 1945–1973. Warsaw: Wydawnictwo MON.
  • Simons, Martin (2006). Sailplanes 1945–1965 (2nd revised ed.). Königswinter: EQIP Werbung und Verlag G.m.b.H. ISBN 3-9807977-4-0.
  • "SZD-17X Jaskółka L". Retrieved 17 June 2013.
  • Glass, Andrzej (ed) (1965) Konstrukcje lotnicze Polski Ludowej , WKiŁ, Warsaw, p. 64–68 (Polish)

Further reading

  • Taylor, J. H. (ed) (1989) Jane's Encyclopedia of Aviation. Studio Editions: London. p. 29

External links

Polish post-1945 gliders
Instytut Szybownictwa
Szybowcowy Zakład Doświadczalny
/ PZL Bielsko-Biała / Allstar PZL Glider
Politechnika Warszawska
Margański & Mysłowski
PZL Krosno
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