Technical Data for Duo Discus | Panel Layout Options | Standard Features and Options
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The Duo Discus is a two-seater purposely conceived by
Schempp-Hirth for advanced training and instruction cross country
flying. It features the well known pleasant handling characteristics
of the single seat Discus and perhaps even better harmony of
controls.

In terms of performance, the Duo Discus with its 20 m wing span (65.62 ft.) is the best two seat sailplane for normal club operation. It keeps up with the Janus even through is has no camber changing flaps. Its flight handling, on the other hand, demands much less attention from the crew.

The appearance of the Duo Discus - which supplements models Janus Ce and Nimbus 4D - bears a great resemblance, as suggested by its name, to the single and the sweptback leading edge of the outer portion, the result is an equally impressive and elegant contour in flight.

The four piece wing is a GFRP foam sandwich construction with spar caps made from carbon fiber rovings. When the outer panels are removed, the span of the Duo Discus is only 16.25 m (53.3 ft) so it is easily hangared and can be transported in a trailer of ordinary length. Ailerons, airbrakes and water ballast dump valves all hook up automatically when the Duo Discus is rigged, which is accomplished easily by three persons with the aid of a wing stand.

 

Wing span	20.0 m	65.62 ft
Wing area	16.4 m²	176.53 ft²
Aspect ratio	24.4	24.4
Fuselage length	8.62 m	28.28 ft
Empty mass approx.	410 kg	904 lb
Max. all-up mass	700 kg	1543 lb
Wing loading	29.3-42.7 kg/m²	6.00-8.74 lb/ft²
Max. water ballast	200 kg	52.8 US Gal (44 IMP Gal)
Max. permitted speed	250 km/h	135 kt (155 mph)
Maneuvering speed	180 km/h	97 kt (112 mph)
Minimum sink rate	0.58 m/s	114 fpm
Maximum L/D (measured)		45
Airfoil section		HQ-31-A/XX