The Grob 103 is a two seater airplane with a T-tail, fitted with nonretractable tandem undercarriage and upper surface airbrakes. It is designed for training, high performance and simple aerobatics.
     

Grob 103 Handbook in PDF format. (496K).
    

Wingspan: 17.5 m
Length: 8.18 m
Height: 1.55 m
Wing area: 17.80 m^2
Aspect ratio: 17
Empty weight: 380 kg
Water Ballast none
Gross weight: 580 kg max
Wing loading: 32.6 kg/m^2 max
Maximum L/D: 36.5 @ 51 kts solo, 37.0 @ 57 kts dual
Minimum sink: 2.1 fps @ 43 kts solo, 2.3 fps @ 46 kts dual