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Name: | Grob G 103 Twin Astir |
| Manufacturer: | Grob Aerospace | |
| Web Site: | http://www.grob-aerospace.de/ | |
| Type: | high performance two seater | |
| Structure: | Fiberglass | |
| Country of origin: | Germany | |
| Designer: | Burkhart Grob | |
| Number of seats : | 2 | |
| Number built : | 311 | |
| Span: | 17.5 m./ 57.4 ft | |
| Lenght: | unknown | |
| Height: | unknown | |
| Wing Area : | 17.89 sq. m. / 192.6 sq.ft | |
| Wing aspect ratio : | 17.1 | |
| Weight empty : | 309 kg. / 859 lb | |
| Max. takeoff weight : | unknown | |
| Pilot weight range: | unknown | |
| Max weight ballast : | unknown | |
| Max. wing loading: | 37.79 kg. / sq. m. ( 7.73 lb. / sq. ft) | |
| L/D max: | 38:1 at 59 kts (109.3 km/h) | |
| Min. Sink: | 0.68 m/s (132.6 fpm / 1.32 kts) at 43 kts (79.6 km/h) | |
| Min. Stall Speed: | 35 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 Twin Astir was a two-seat development of the Standard Class Astir CS. | |
| Notes: | The gear retracts by folding up to the left and lying horizontally under the rear seat. A 3.3 degrees forward sweep of the wing was replaced early in the production run by a straight wing with leading edges at right angles to the fuselage centerline. In contrast to later G 103 models, the Twin Astir has the main wheel ahead of the center of gravity, and does not have a nose wheel. It was offered with a tailskid, with a tail wheel as an option. |