Schleicher ASH 25

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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'. 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. It was superseded in production by the ASH 30.

In 2010 an Australian ASH 25Mi 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 24hp Rotax 275 engine
ASH 25M - Self-launching version with a 60hp AE50R engine
ASH 25Mi - Self-launching version with a 60hp 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)

General characteristics

Crew: Two
Capacity: 120 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: 60:1^[1]
Rate of sink: 0.42 m/s (83 ft/min)

References

Wikimedia Commons has media related to ASH 25.

Alexander Schleicher GmbH & Co
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

References

↑ http://www.alexander-schleicher.de/service/prospekte/25E.pdf

v t e Schleicher glider types

Wooden construction pre-World War II	Condor Hols der Teufel Moagazotl Poppenhausen Rhönadler Rhönbussard

Wooden construction (Rudolf Kaiser)	Ka 1 Rhönlaus Ka 2 Rhönschwalbe Ka 3 Ka 4 Rhönlerche II Ka 6 Rhönsegler K7 K 8 K 10 ASK 13 ASK 14 ASK 16 ASK 18

GRP construction (Rudolf Kaiser)	ASK 21 ASK 23

GRP construction (Gerhard Waibel)	ASW 12 ASW 15 ASW 17 ASW 19 ASW 20 ASW 22 ASW 24 ASW 27 ASW 28

GRP construction (Martin Heide)	ASH 25 ASH 26 ASH 30 ASH 31

GRP construction (Michael Greiner)	ASG 29

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Records	Airspeed Altitude Distance Endurance Firsts Large Most-produced aircraft Most-produced rotorcraft

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Schleicher ASH 25

Design and development

Variants

Specifications (with 25.6 metre wings)

See also

References

References