The ASH 25 is a two-seater high performance Open Class glider manufactured by Alexander Schleicher from 1986 until September 2008, originally with a 25-metre wingspan.

In 1984, designer Martin Heide (the 'H' in the type designation) combined the wing of the World Championship winning single-seater Schleicher ASW 22[3] with a fuselage derived from the Akaflieg Stuttgart fs31 which had particularly low drag.

[4]: 2 [5] 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.

Data from Specifications for ASH 25 / ASH 25 Mi[4]: 4 General characteristics Performance