Schleicher ASH 25

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ASH 25
Role Open Class sailplane
National origin Germany
Manufacturer Schleicher
Designer Martin Heide
Number built 260+

The ASH 25 is a two-seater high performance Open Class glider manufactured by Alexander Schleicher until September 2008, originally with a 25-metre wingspan.

Design and development[edit]

Designer Martin Heide (the 'H' in the type designation) combined the wing of the World Championship winning single-seater Schleicher ASW 22 with a fuselage derived from the Akaflieg Stuttgart FS-31 which had particularly low drag. The prototype was designated 'AS 22-2'.[1] The span was increased in later versions to 25.6 or 26 metres with winglets.

A 'turbo' version was also developed, the ASH 25E, followed by the self-launching ASH 25 Mi with a large retractable propeller and a Wankel engine. It was superseded in production by the ASH 30.


ASH 25
A 25m Open class glider, 25.6m or 26m wingspan when fitted with option winglets.
Self-sustaining version (not self-launching) with a 24 hp Rotax 275 engine
Self-launching version with a 60 hp AE50R engine. Both the ASH 25 and ASH 25E can be converted to the ASH 25M by the manufacturer.
ASH 25 Mi
Self-launching version with a 60 hp IAE50R-AA engine. The ASH 25, ASH 25E and ASH 25M can be converted to the ASH 25Mi by the manufacturer.
Self-launching version with a jet engine
Self-launching version with a Rotax 535C engine, 27m wingspan and one-piece canopy
ASH 25EB/28
Self-launcher with one-piece canopy and 28m wingspan

Specifications (with 25.6 metre wings)[edit]

Data from [2]

General characteristics

  • Crew: 2
  • Length: 8.97 m (29 ft 5 in)
  • Wingspan: 25.6 m (84 ft 0 in)
  • Height: 1.7 m (5 ft 7 in)
  • Wing area: 16.5 m2 (178 sq ft)
  • Aspect ratio: 39.8
  • Airfoil: root:HQ 17; tip:DU 84-132/V3
  • Empty weight: 478 kg (1,054 lb)
  • Max takeoff weight: 750 kg (1,653 lb)
  • Water ballast: 120 l (32 US gal; 26 imp gal)


  • Never exceed speed: 280 km/h (174 mph; 151 kn)
  • Maximum glide ratio: ca. 60:1
  • Rate of sink: 0.42 m/s (83 ft/min)

See also[edit]

Related lists



  • "Specification ASH 25 / ASH 25 Mi (english)" (PDF). Alexander Schleicher GmbH & Co. Segelflugzeugbau. July 2003. Archived from the original (PDF) on 23 January 2015. Retrieved 3 August 2014.

Further reading[edit]

  • Johnson, Richard (May 1988), "A Flight Test Evaluation of the ASH 25" (PDF), Soaring, New Mexico, USA: Soaring Society of America, Inc., archived from the original (PDF) on April 11, 2003, retrieved 3 August 2014
  • Simons, Martin (2005). Sailplanes 1965–2000 (2nd revised ed.). Königswinter: EQIP Werbung und Verlag G.m.b.H. ISBN 978-3-9808838-1-8.
  • Milgram, Fred Thomas; Judah; translator; contributor (1999). Fundamentals of sailplane design (3rd ed.). College Park, MD: College Park Press. ISBN 978-0966955309.

External links[edit]