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Name: | Grob Astir CS 77 |
| Manufacturer: | Grob Aerospace | |
| Web Site: | http://www.grob-aerospace.de/ | |
| Type: | high performance one seater | |
| Structure: | Fiberglass | |
| Country of origin: | Germany | |
| Designer: | Burkhart Grob | |
| Number of seats : | 1 | |
| Number built : | 864 | |
| Span: | 15.0 m./ 49.2 ft | |
| Lenght: | 28.3 ft | |
| Height: | 5.4 ft | |
| Wing Area : | 12.40 sq. m. / 133.5 sq.ft | |
| Wing aspect ratio : | 18.2 | |
| Weight empty : | 255 kg. / 562 lb. | |
| Max. takeoff weight : | 450 kg / 992 lb. | |
| Pilot weight range: | 62 kg / 99.5 kg | |
| Max weight ballast : | 100 kg | |
| Max. wing loading: | 36.29 kg. / sq. m. ( 7.43 lb. / sq. ft) | |
| L/D max: | 38:1 at 56 kts (105 km/h / 65 mph) | |
| Min. Sink: | 0.70 m/s (137 fpm / 1.36 kts) at 46 kt (85 kmh / 53 mph) | |
| Min. Stall Speed: | 33 kts | |
| Max. Speed: | unknown | |
| Max. rough Speed: | unknown | |
| Max. aerotow Speed: | unknown | |
| Max. Winch Speed: | unknown | |
| G. Limits: | unknown | |
| Wheel: | retractable | |
| Flaps: | No | |
| Main Wings Airfoil: | Eppler E-603 | |
| Vert. Stabilizer Airfoil: | unknown | |
| Horizon. Stab. Airfoil: | unknown | |
| History: | The Astir CS (club standard) was the first sailplane designed and serially produced by Grob. A slightly improved version, the CS-77, was introduced in 1977. | |
| Notes: | It features composite (fiberglass/resin) construction, a large wing area, and a T-tail. A Standard Class Sailplane, the large wing area gives good low speed handling characteristics. The main gear retracts. The CS-77 has a different rudder profile fuselage similar to that of the Speed Astir. |