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Schleicher ASW 28
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| Type designation | ASW 28 |
| Competition class | Standard |
| Crew | 1 |
| Length | 6.585 m |
| Height | 1.30 m |
| Cockpit width | 0.64 m |
| Cockpit height | 0.80 m |
| Wingspan | 15 / 18 m |
| Wing area | 10.50 m² (15 m) 11.88 m² (18 m) |
| Aspect ratio | 21.43 (15 m) 27.27 (18 m) |
| Wing profile | DU 99-147 and DU 99-125 |
| Empty mass | 240 kg (ASW 28) 258 kg (ASW 28-18 at 15m) 270 kg (ASW 28-18) |
| Water ballast | 200 kg (ASW 28) 190 kg (ASW 28-18) |
| Maximum mass | 525 kg (15 m) 575 kg (18 m) |
| Wing loading | 30 – 50 kg/m² (ASW 28) 32 – 50 kg/m² (ASW 28-18) 29 - 48.4 kg/m² (18 m) |
| Maximum speed | 270 km/h |
| Rough air speed | 200 km/h |
| Stall speed | 72 km/h |
| Minimum sink rate | ca. 0.56 / 0.48 m/s |
| Best glide ratio | 45 at 100 km/h (15 m) 48 at 90 km/h (18 m) |
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| Engine type | Solo 2350 2-stroke |
| Engine power | 13.5 kW (18 hp) at 4200 rpm |
| Climb rate in powered flight |
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| Range in 'saw-tooth' operation |
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The ASW 28 is a Standard Class glider with a fifteen metre span built of modern fibre reinforced composites. The manufacturer of the ASW-28 is Alexander Schleicher GmbH & Co. The 'W' indicates this is a design of the influential and prolific German designer Gerhard Waibel. Serial production started in 2000.
As all Standard Class sailplanes, the ASW-28 does not have flaps or other lift-enhancing devices. It has tall winglets, a retractable undercarriage and a water ballast system. The structure is a complex composite of carbon, aramid and polyethylene fibre reinforced plastic. This permits a light structure with the strength to carry large amounts of water ballast, thus permitting the widest possible range of wing loadings for weak and strong soaring weather.
The ASW-28 supersedes the ASW 24 in the manufacturer's production line. It has - like its competitors Rolladen-Schneider LS8 and Schempp-Hirth Discus-2 - a version with wing extensions for the increasingly popular 18 metre Class, the ASW 28-18. The sustainer (non-self-launching) variant of the 18 metre version is the ASW 28-18 E.
Sources
- Alexander Schleicher GmbH & Co
- Sailplane Directory
- Simons M, Segelflugzeuge 1965-2000, Eqip, 2004
