Swift S-1

The Swift S-1 is a single seat aerobatic glider manufactured by Polish company Swift Ltd.

Swift S-1
Role Aerobatic glider
Manufacturer Swift Ltd.
Designer Edward Marganski and Jerzy Cisowski
First flight 6 August 1991 (proof of concept glider: 11 January 1991)
Primary users Jerzy Makula
see European and World Glider Aerobatic Championships for further users
Produced 1991–1997
Number built 30 (+ proof of concept glider)
Developed from SZD-21 Kobuz

Design and development

Edward Margański, Jerzy Cisowski and Jerzy Makula developed the Swift at Bielsko-Biała from the SZD-21-2b Kobuz 3.[1][2] The prototype first flew in 1991.

The glider is made of glass-fibre epoxy composite. It is very strong (stressed for plus and minus 10g) and manoeuvrable (a roll takes less than 4 seconds). Larger tips to increase the span to 15m were designed but not made. It has a retractable undercarriage.

Specifications

Data from [1]

General characteristics

  • Crew: 1
  • Length: 6.91 m (22 ft 8 in)
  • Wingspan: 12.7 m (41 ft 8 in)
  • Wing area: 11.8 m2 (127 sq ft)
  • Tailplane area: 1.65 m2 (17.8 sq ft)
  • Fin area: 0.9 m2 (9.7 sq ft)
  • Aspect ratio: 14.3
  • Airfoil: NACA 641412
  • Tailplane airfoil: NACA 631012-63006
  • Fin airfoil: NACA 632015-63012
  • Empty weight: 280 kg (617 lb)
  • Gross weight: 390 kg (860 lb)

Performance

  • Never exceed speed: 320 km/h (200 mph, 170 kn) diving
  • Maximum manoeuvring speed: 228 km/h (142 mph; 123 kn)
  • g limits: +10 g / - 7.5 g
  • Maximum glide ratio: 30:1 at 107 km/h (66 mph; 58 kn)
  • Rate of sink: 0.9 m/s (180 ft/min)
Swift S-1

Comparable aircraft

References
  1. ""SWIFT" S-1". marganski.com. Retrieved 30 January 2019.
  2. "Swift S-1". www.sagach.ch (in German). Retrieved 30 January 2019.
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