Ellehammer Werks
by S Paul Sahm
Title
Ellehammer Werks
Artist
S Paul Sahm
Medium
Photograph - Print/canvas/custom
Description
In 1903 - 1904 Jacob Ellehammer used his experience constructing motorcycles to build the world 's first air-cooled radial engine, a three-cylinder engine which
he used as the basis for a more powerful five-cylinder model in 1907. This was installed in his tri-plane and made a number of short free-flight hops.
In 1905, he constructed a monoplane, and in the following year a "semi-biplane". In this latter machine, he made a tethered flight on 12 September 1906.
Ellehammer's later inventions included a successful triplane and helicopter. His helicopter was a coaxial machine. A famous photo shows it hovering in 1914,
though there is no evidence that it was successful in achieving translational flight. Ellehammer later studied a disc-rotor configuration - a compound helicopter
with coaxial blades that extended from the hub for hover, and retracted for high speed horizontal flight. Although a wind tunnel model was constructed, there's no
evidence that anything more was studied.
Uploaded
March 9th, 2017
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