DH1 may refer to:
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DH-1 (rocket) The DH-1 was a circa-2005 reusable two-stage-to-orbit rocket concept proposed in the book The Rocket Company (novel), ''The Rocket Company'' by Patrick J. G. Stiennon, David M. Hoerr, Doug Birkholz (American Institute of Aeronautics and Astronautics ...
, a proposed two-stage rocket design
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Airco DH.1
The Airco DH.1 was an early military biplane of typical "Farman" pattern flown by Britain's Royal Flying Corps during World War I. By the time the powerplant for which it was designed was sufficiently plentiful it was obsolete as an operationa ...
, a British First World War biplane
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EMD DH1, an experimental switching locomotive
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Häfeli DH-1
The Häfeli DH-1 was a 1910s Swiss two-seat reconnaissance aircraft, built by the aircraft department of the Federal Construction Works (''Eidgenoessische Konstruktionswerkstaette'', K+W) at Thun, Switzerland.
Development and design
In 1915 K + ...
, a Swiss reconnaissance aircraft built 1916
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Rhodesia Railways class DH1, a class of diesel locomotive
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