Grob 103 Twin Astir

Specifications

• Span 17.5 m./ 57.4 ft
• Area 17.89 sq. m. / 192.6 sq.ft.
• Aspect ratio 17.1
• Airfoil Eppler E 603
• Empty weight 309 kg. / 859 lb.
• Payload 286 kg. / 631 lb.
• Gross weight 676 kg / 1,490 lb.
• Wing loading 37.79 kg. / sq. m. / 7.73 lb. / sq. ft.
• Structure fiberglass 

Performance

• L/D max. 38 109 kph / 59 kt / 68 mph
• Min. sink 0.68 m/s / 2.23 fps / 1.32 kt
• 79 kph / 43 kt / 49 mph

Other

• Country of origin Germany
• Designer Burkhart Grob
• No. of seats 2
• No. built 311

The Twin Astir was a two-seat development of the Standard Class Astir CS. 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. The G 103T Twin Aster had a fixed main wheel.