Glasflügel BS-1

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The Glasflügel BS-1, sometimes called the Björn Stender BS-1 or the Stender BS-1, is a West German, high-wing, single seat, T-tailed, FAI Open Class glider that was designed by Björn Stender and produced by Glasflügel.[1][2]

Design and development

The prototype BS-1 was designed by Stender as the initials indicate; the BS-1 was closely based on his earlier Akaflieg Braunschweig SB-6 Nixope, produced whilst he was still an undergraduate. Two prototypes were built by him and his three assistants in 1962. He was then a young engineering student and designed the aircraft at the request of a South African sailplane pilot and industrialist, producing a design that was very advanced for its time. While the designer was test flying of one of the prototypes in 1963 the aircraft suffered an in-flight structural failure and Stender was killed. Glasflügel then took over the project and re-engineered the design, based on their experience producing the Glasflügel H-301 Libelle. The company went on to build 18 production aircraft.[1][2][3]

The BS-1 is constructed entirely from fiberglass and features an 18.0 m (59.1 ft) wing with flaps and dive brakes. For further glidepath control the BS-1 has a tail-mounted parachute. The landing gear is a retractable monowheel.[1][2]

A planned improved model, the BS-1b, was never produced.[2]

Operational history

The BS-1 was considered one of the first soaring "super ships" and was one of the most high-performing gliders of its time, the mid-1960s. Alfred Rohm of West Germany flew a BS-1 to a world 300 km (186 mi) speed record of 135.3 km/h (84 mph) in 1967.[4] Thierry Thys of San Leandro, California flew a BS-1 on a 917 km (570 mi) flight in 1970. At that time it was the third-longest soaring flight ever made.[1][2]

Aircraft on display

Specifications (BS-1)

Data from Sailplane Directory and Soaring[1][2]

General characteristics

  • Crew: one
  • Wingspan: 18.0 m (59 ft 1 in)
  • Wing area: 14.09 m2 (151.7 sq ft)
  • Aspect ratio: 23:1
  • Empty weight: 310 kg (684 lb)
  • Gross weight: 450 kg (993 lb)

Performance

  • Maximum glide ratio: 44:1 at 84 km/h (52 mph)
  • Rate of sink: 0.543 m/s (106.8 ft/min) at 80 km/h (50 mph)
  • Wing loading: 32 kg/m2 (6.5 lb/sq ft)

See also

Aircraft of comparable role, configuration and era
Related lists

References

  1. 1.0 1.1 1.2 1.3 1.4 Activate Media (2006). "BS-1 Glasflugel". Retrieved 9 July 2011. 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 79, Soaring Society of America November 1983. USPS 499-920
  3. Simons, Martin (2006). Sailplanes 1945-1965 (2nd revised ed.). Königswinter: EQIP Werbung & Verlag GmbH. pp. 258–261. ISBN 3 9807977 4 0. 
  4. Air Progress: 18. Septemebr 1971. 
  5. National Soaring Museum (2011). "Sailplanes in Our Collection". Retrieved 9 July 2011. 

External links

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