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Schleicher ASH 25
From PlaneSpottingWorld, for aviation fans everywhere
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| Type designation | ASH 25 |
| Competition class | Open |
| Number built | 250+ |
| Crew | 2 |
| Length | 8.97 m |
| Height | 1.7 m |
| Cockpit width | 0.71 m |
| Cockpit height | 0.98 m |
| Wingspan | 25 / 25.6 / 26 m |
| Wing area | 16.31 / 16.46 / 16.62 m² |
| Aspect ratio | 38.32 / 39.82 / 40.67 |
| Wing profile: | HQ 17 and DU 84-132/V3 |
| Empty mass | 470 / 478 / 484 kg |
| Water ballast | 120 kg |
| Maximum mass | 750 kg |
| Minimum wing loading | 34 kg/m² |
| Maximum wing loading | 46.0 / 45.6 / 45.1 kg/m² |
| Maximum speed | 280 km/h |
| Stall speed | 75 km/h at 34 kg/m² |
| Minimum sink rate | 0.42 m/s at 34 kg/m² |
| Best glide ratio | ca. 58 / 60 / 60 |
| Roll rate | 6.5 s at 95 km/h (-45° to 45°) |
| Engine type | Midwest (Wankel rotary) |
| Power | 41 kW at 7750 rpm |
The ASH 25 is a two-seater high performance Open Class glider manufactured by Alexander Schleicher, originally with a 25 metre wing span. Designer Martin Heide (the 'H' in the type designation) combined the wing of the World Championship winning single-seater Schleicher ASW 22 with fuselage derived from the Akaflieg Stuttgart FS-31 which had particularly low drag. The prototype was designated 'AS 22-2'. 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 25Mi with a large retractable propeller and a Wankel engine.
Sources
- Sailplane Directory
- Johnson R, A Flight Test Evaluation of the ASH 25, Soaring, May 1988
- Simons M, Segelflugzeuge 1965-2000, Equip, 2004
- Thomas F, Fundamentals of Sailplane Design, College Park Press, 1999
