The ASH 25 is a two-seater high performance Open class glider manufactured byAlexander Schleicher until September 2008, originally with a 25 metre wingspan. Designer Martin Heide (the 'H' in the type designation) combined the wing of the  single-seater ASW 22 with fuselage derived from the 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.

 Specifications (with 25.6 metre wings)

General characteristics

• Crew: Two
• Capacity: 220 kg (264 lb) of water ballast
• 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 (177 ft²)
• Aspect ratio: 39.8
• Wing profile: HQ 17 and DU 84-132/V3
• Empty weight: 478 kg (1,050 lb)
• Gross weight: 750 kg (1,650 lb)

Performance

• Maximum speed: 280 km/h (175 mph)
• Maximum glide ratio: 57
• Rate of sink: 0.42 m/s (83 ft/min)