Name:
DG Flugzeugbau DG-303
Manufacturer: DG Flugzeugbau
Web Site: http://www.dg-flugzeugbau.de/index-e.html
Type: high performance one seater
Structure: Fiberglass
Country of origin: Germany
Designer: Wilhelm Dirks
Number of seats : 1
Number built : unknown
Span: 15 m./ 49.2 ft
Lenght: unknown
Height: unknown
Wing Area : 10.27 sq. m. / 110.5 sq.ft
Wing aspect ratio : 21.9
Weight empty : 240 kg. / 529 lb
Max. takeoff weight : 525 kg. / 1,157 lb
Pilot weight range: unknown
Max weight ballast : 130 l / 34.5 gal.
Max. wing loading: 51.1 kg. / sq. m. ( 10.5 lb. / sq. ft)
L/D max: 44:1
Min. Sink: 0.53 m/s (103 fpm / 1.00 kts)
Min. Stall Speed: 35 kts (weight: 320 kg / 705 lb)
Max. Speed: 146 kts (270 km/h)
Max. rough Speed: unknown
Max. aerotow Speed: unknown
Max. Winch Speed: unknown
G. Limits: +7/-5 g
Wheel: retractable
Flaps: No
Main Wings Airfoil: Horstmann Quast
Vert. Stabilizer Airfoil: unknown
Horizon. Stab. Airfoil: unknown
History: The Standard Class successor to the DG-101 featues an HQ airfoil with blow-holes to inject high-energy air into the boundary layer to delay laminar separation. Some were manufactured by Elan in Slovenia.
Notes:

The DG-300 has fin ballast for center of gravity control. Approach control is by top surface Schemmpp-Hirth type airbrakes. Like other DG ships, the –300 features a parallelogram stick to avoid turbulence-included control inputs.
The improved DG-303 Elan model (which also comes in standard, standard Acro, Club and Club Acro variants) has a modified wing section and winglets. The wing section was modified for lower drag, espacially for better high performance. The winglets will improve the performance in thermalling and the max. L/D (increase app. two points glide angle). In addition the winglets improve dramatically the handling characteristics while thermaling. This is another source of better climb performance.