The Ellehammer triplane was a pioneering aircraft built in Denmark in 1907.
Unlike Ellehammer's semi-biplane of the previous year, this (otherwise unnamed) triplane was capable of making free, untethered flights.
The aircraft featured three sets of triangular wings attached to an open tubular framework.
Around this time, he also started making curved flights.
In June, Ellehammer demonstrated the triplane in Kiel, where he was able to collect a M 5,000 prize from Prince Henry of Prussia for making a powered flight in Germany.