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Scheibe Bergfalke

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Length
  
8 m

First flight
  
August 5, 1951

Designer
  
Wingspan
  
17 m

Manufacturer
  
Scheibe Flugzeugbau

Scheibe Bergfalke Scale Soaring UK Bergfalke Documentation

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The Scheibe Bergfalke (German: "mountain hawk") is a German glider designed by Egon Scheibe as a post-World War II development of the Akaflieg München Mü13 produced before and during the war.

Contents

Scheibe Bergfalke 1954 Scheibe Bergfalke M13 E ScaleSoaringcom

Design and development

The prototype flew on 5 August 1951 as the Akaflieg München Mü13E Bergfalke I and by the end of the year, Scheibe had established his own works at the Munich-Riem Airport to produce the type as the Bergfalke II. It was a mid-wing sailplane of conventional design with a non-retractable monowheel undercarriage and a tailskid. The fuselage was a welded steel structure covered in fabric and enclosed two seats in tandem. The wings had a single wooden spar and were covered in plywood.

Scheibe Bergfalke Scheibe Bergfalke II55 Untitled Aviation Photo 2384972

Subsequent versions introduced forward sweep to the wings, a more aerodynamic canopy, airbrakes, and a tailwheel in place of the tailskid. By 1982, Scheibe had built over 300 of these aircraft, and Stark Ibérica built a number of the Bergfalke III version under license in Spain. Scheibe also developed a motorglider version as the Bergfalke IVM but this did not enter production.

Scheibe Bergfalke 1954 Scheibe Bergfalke M13 E ScaleSoaringcom

In 1976, two Bergfalke motorgliders participated in the Sixth German Motor Glider Competition. Later, one of these aircraft set a world 300 km triangle record.

Variants

Scheibe Bergfalke httpsuploadwikimediaorgwikipediacommonsthu
Mü13E Bergfalke I
Prototype
Bergfalke II
First production version, 4° forward sweep on wings
Bergfalke II/55
Skopil Bergfalke II/55
Motorglider conversion done by Arnold Skopil of Aberdeen, Washington, United States in 1957. One converted.
Bergfalke III
Streamlined canopy, taller fin and rudder, Schempp-Hirth airbrakes, 2° forward sweep on wings
Bergfalke IV
Wing of Wortmann section with 60-cm (2-ft) greater span
Bergfalke IVM
Motorglider version with 39-kW (52-hp) Hirth O-28 engine mounted on retractable pylon behind cockpit.

Specifications (Bergfalke II/55)

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

General characteristics

Scheibe Bergfalke Characteristics Bergfalke III

  • Crew: 2
  • Length: 8 m (26 ft 3 in)
  • Wingspan: 16.6 m (54 ft 6 in)
  • Wing area: 17.7 m2 (191 sq ft)
  • Aspect ratio: 15.6
  • Airfoil: Mü-Profil 14.5%
  • Empty weight: 246 kg (542 lb)
  • Max takeoff weight: 440 kg (970 lb)
  • Performance

  • Stall speed: 60 km/h (37 mph; 32 kn)
  • Never exceed speed: 160 km/h (99 mph; 86 kn)
  • Rough air speed max: 120 km/h (74.6 mph; 64.8 kn)
  • Aerotow speed: 120 km/h (74.6 mph; 64.8 kn)
  • Winch launch max speed: 85 km/h (52.8 mph; 45.9 kn)
  • Terminal velocity: 205 km/h (127.4 mph; 110.7 kn) (max all-up weight + full airbrakes / flaps)
  • g limits: +4 -2
  • Maximum glide ratio: 28:1at 80 km/h (49.7 mph; 43.2 kn)
  • Rate of sink: 0.72 m/s (142 ft/min) at 72 km/h (44.7 mph; 38.9 kn)
  • Wing loading: 24.8 kg/m2 (5.1 lb/sq ft)
  • References

    Scheibe Bergfalke Wikipedia