The ASW 24 had essentially eliminated the performance difference between the standard class and the FAI-15m-class. This set the stage for Gerhard Waibel to develop a new 15 m flapped sailplane: the ASW 27. The very low drag fuselage of the ASW 24 received a new tailplane and a new fuselage-wing transition for the flapped wing.
The subsequent ASW 27 B variant received integrated water ballast tanks instead of water bags in the wings, higher winglets from Darlington and a new flap setting of 3a.
Technical Data
| Muster / Type | ASW 27 / ASW 27 B |
| Klasse / Class | FAI 15 m |
| Sitze / Seats | 1 |
| Erstflug / Maiden flight | 03.04.1995 |
| Herstellungszeitraum / Production period | 1995 – 2009 |
| Stückzahl / Number of pieces | 237 |
| Konstrukteuer / Designer | Gerhard Waibel |
| Spannweite / Span | 15.0 m |
| Rumpflänge / Fuselage length | 6.5 m |
| Höhe / Height | 1.3 m |
| Flügelfläche / Wing area | 9.0 m² |
| Flügelstreckung / Wing aspect ratio | 25 |
| Flügelprofil / Airfoil | DU 89 – 134/14 |
| Leermasse / Empty weight | 235 kg |
| Höchstflugmasse / Max. weight | 500 kg |
| Wasserballast | 180 l |
| Max. Flächenbelastung / Max. wing load | 55,5 kg/m² |
| Geringstes Sinken / Min. sink | 0.5 m/s |
| Gleitzahl / Best glide ratio | 48 |
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