The Daimler D.I (also known by the company designation L6) was a German fighter aircraft of World War I. It was a conventional biplane design with a very small interplane gap - the top wing nearly touched the top of the fuselage. Power was provided by a Daimler D.III engine.
Design and development
The L6 prototype competed in the second Idflieg competition for a new fighter design in 1918. The competition was held at Adlershof from 22 May through 21 June. This resulted in an order for 20 aircraft being placed.
Data from The Complete Book of Fighters 
- Crew: one
- Length: 7.30 m (23 ft 11⅜ in)
- Wingspan: 9.90 m (32 ft 5¾ in)
- Height: 2.76 m (9 ft 0⅔ in)
- Wing area: 22.6 m² (243 ft²)
- Empty weight: 750 kg (1,653 lb)
- Loaded weight: 925 kg (2,039 lb)
- Powerplant: 1 × Daimler D.IIIb V-8 liquid-cooled piston engine, 138 kW (185 hp)
- Maximum speed: 183 km/h (99 knots, 114 mph)
- Service ceiling: m (ft)
- Wing loading: kg/m² (lb/ft²)
- Power/mass: W/kg (hp/lb)
- Endurance: 2 hours
- Climb to 6,000 m (19,700 ft): 30 minutes
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- Green and Swanborough 1994, p.145.
- Gray and Thetford 1962, p.315.