The Häfeli DH-1 was a 1910s Swiss two-seat reconnaissance aircraft, built by the aircraft department of the Federal Construction Works (Eidgenoessische...

earlier design (the DH-1), August Häfeli designed a more conventional biplane for reconnaissance duties designated the Häfeli DH-2. It was a two-bay of...

K + W) at Thun, Switzerland. The Häfeli DH-5 was a two-seat reconnaissance aircraft designed by August Häfeli. It was a single-bay biplane of wood...

Häfeli DH-3. ETH-Bibliothek Zürich, Bildarchiv. Häfeli DH-3 (M III) No 530, Argus As II engine, viewer ETH-Bibliothek Zürich, Bildarchiv. Häfeli DH-3...

The Häfeli DH-4 was a Swiss fighter prototype in the late 1910s, build by the Eidgenoessische Konstruktionswerkstaette. The DH-4 was a single-seat fighter...

DH-1 (rocket), a proposed two-stage rocket design Airco DH.1, a British First World War biplane EMD DH1, an experimental switching locomotive Häfeli DH-1...

H.V.1 Haessler H3 (August Häfeli) Häfeli DH-1 Häfeli DH-2 Häfeli DH-3 Häfeli DH-4 Häfeli DH-5 Militär-Apparat MA-7 (Raoul Hafner) Hafner-Rath HR-1 Gelse...

the company tanks in Thun, Bern, Switzerland. Häfeli DH-1 Häfeli DH-2 Häfeli DH-3 Häfeli DH-4 Häfeli DH-5 Militär-Apparat MA-7 EKW C-35 EKW C-3600 EKW...

least one MG 94 was converted to an air-cooled model for use on the Häfeli DH-1 reconnaissance aircraft. In 1899 Switzerland procured 69 heavy machine...

12 June 2015. "EKW C-35". old.hermannkeist.ch. Retrieved 12 June 2015. "Häfeli". old.hermannkeist.ch. Retrieved 12 June 2015. "Piper Super Cub". old.hermannkeist...