EKW, Eidgenösschische Konstruktionswerkstätten / K+W Häfeli DH-3 (M III)
Reconnaissance / Trainer Biplane

Photo ©: Karsten Palt
The EKW / K+W Häfeli DH-3 is a single engine two seat reconnaissance and trainer biplane aircraft produced by the Swiss manufacturer Eidgenössische Konstruktionswerkstätten.
The DH-3 is a development of the unsuccessful Häfeli DH-2. The DH-3 was in operation with the Swiss Air Force only.
Propulsion | 1 Piston Engine |
Engine Model | Argus As II |
Engine Power | 88 kW | 118 hp |
Speed | 250 km/h | 135 kts 155 mph |
Service Ceiling | 4.000 m | 13.123 ft |
Rate of climb | 132 m/min | 433 ft/min |
Range | 400 km | 216 NM 249 mi. |
Empty Weight | 665 kg | 1.466 lbs |
max. Takeoff Weight | 1.040 kg | 2.293 lbs |
Wing Span | 12,00 m | 39 ft 4 in |
Wing Area | 38,0 m² | 409 ft² |
Length | 8,05 m | 26 ft 5 in |
Height | 3,10 m | 10 ft 2 in |
First Flight | 1917 |
Production Status | out of production |
Production Range | 1917-1925 |
Total Production | 110 |
Developed from | EKW/K+W Häfeli DH-2 |
Data for (Version) | EKW DH-3 |
Variants | DH-3 (M III), DH-3a (M IIIa), DH-3b (M IIIb) |