Schleicher ASH 25
| ASH 25 | |
|---|---|
 | |
| Role | Open Class sailplane |
| National origin | Germany |
| Manufacturer | Schleicher |
| Designer | Martin Heide |
| Number built | 260+ |
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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
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 It was superseded in production by the ASH 30.
In 2010 an Australian ASH 25 Mi was converted to be powered by two jet engines, under the power of which it is capable of launching.
Variants
- ASH 25
- Open class glider with 25m, 25,6m or 26m wingspan
- ASH 25E
- Self-sustaining version with a 24 hp Rotax 275 engine
- ASH 25M
- Self-launching version with a 60 hp AE50R engine
- ASH 25 Mi
- Self-launching version with a 60 hp IAE50R-AA engine
- ASH 25J
- Self-launching version with a jet engine
- ASH 25EB
- 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)
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)
Performance
- 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
- Related lists
Notes
References
- "Specification ASH 25 / ASH 25 Mi (english)" (PDF). Alexander Schleicher GmbH & Co. Segelflugzeugbau. July 2003. Retrieved 3 August 2014.
Further reading
- Johnson, Richard (May 1988), "A Flight Test Evaluation of the ASH 25" (PDF), Soaring (New Mexico, USA: Soaring Society of America, Inc.), 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 ed.). College Park, MD: College Park Press. ISBN 978-0966955309.
External links
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Wikimedia Commons has media related to ASH 25. |
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