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de Havilland DH9 (1:48)

In 1916 the British aircraft manufacturer Airco produced a single-engine two-seat multipurpose airplane, which gained its place in the history of aviation as the D.H.4. Its design was so successful, that machines of this type were used right up until the end of WWI. The main weakness of the D.H.4 was the power installation several different types of engines were fitted to the airplane during its time in production, and even more were tested in experimental developments. The type had great potential for further perfection, and soon after the beginning of series production the designers led by Geoffrey de Havilland set to work on a new version of the D.H.4 leading to the D.H.9