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The Rolladen-Schneider LSD Ornith is the first two-seater sailplane to have been built from plastic composites. The single exemplar was designed by Wolf Lemke and Karl Pummer and first flew in May 1972, a few weeks before the Akaflieg Braunschweig SB-10 Schirokko.

LSD Ornith
Role	Two-seater class sailplane Type of aircraft
National origin	Germany
Manufacturer	Rolladen-Schneider
First flight	May 1972
Number built	1

Design and development

As far as possible, components from the serially-produced LS1 sailplane were used, including the fuselage forms. This resulted in a cramped cockpit, where the pedals of the rear seat are almost upon the front seat control stick. The two-piece canopy extends back up to the wing spar. The undercarriage comprises fixed wheel and tailskid. The very large rudder is quite striking. The wings were extended at the root by approximately one and a half metres, yielding a span of eighteen metres, with two degrees of negative sweep. Schempp Hirth airbrakes sprout from the wing upper surfaces. Separate actions for the nose-hook and centre of gravity hook are the only control oddity in this pleasant-flying design. The empty weight of only 287 kg is remarkably light for a double-seater.

The Ornith achieved some notable gliding records flying from Switzerland and South Africa. Only one LSD was built and is today in the German Gliding Museum on the Wasserkuppe mountain.

Specifications

General characteristics

• Crew: Two
• Wingspan: 18.00 m (59 ft 1 in)
• Wing area: 12.4 m² (133 sq ft)
• Aspect ratio: 26.1
• Empty weight: 287 kg (631 lb)
• Gross weight: 450 kg (990 lb)

Performance

• Maximum glide ratio: >40
• Rate of sink: 0.60 m/s (120 ft/min)

See also

Related lists

• List of gliders

References

Wikimedia Commons has media related to Rolladen-Schneider LSD Ornith.

• Sailplane Directory
• Simons M, Segelflugzeuge 1965–2000, Eqip, 2004

На других языках

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[de] Rolladen Schneider LSD Ornith

Die LSD Ornith ist ein doppelsitziges Segelflugzeug. Die LSD Ornith (D für Doppelsitzer) ist ein eher privat entstandenes Segelflugzeug mit hoher Leistungsfähigkeit. Konstruiert wurde sie von Wolf Lemke und gemeinsam mit Karl Pummer 1969/1970 gebaut.[1] Der Erstflug fand am 8. Mai 1971 statt, einige Wochen vor der Braunschweiger SB 10. Sie war somit der erste Doppelsitzer in Kunststoff-Bauweise.

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- [en] Rolladen-Schneider LSD Ornith

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[fr] Rolladen-Schneider LSD Ornith

Le Rolladen-Schneider LSD Ornith est le premier biplace fabriqué en matériaux composites. L'unique exemplaire a été conçu par Wolf Lemke et Karl Pummer et effectue son premier vol en mai 1972, soit quelques semaines avant le SB-10.

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