Dornier Do X

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Dornier Do X" – news · newspapers · books · scholar · JSTOR (April 2009) (Learn how and when to remove this message)

Do X
General information
Type	airliner, flying boat
Manufacturer	Dornier
Designer	Claude Dornier
Primary users	Regia Aeronautica Dornier Flugzeugwerke, Deutsche Luft Hansa
Number built	3
History
Manufactured	1929-1932
Introduction date	1929
First flight	12 July 1929[1]
Retired	1937

The Dornier Do X was the largest, heaviest, and most powerful flying boat in the world when it was produced by the Dornier company of Germany in 1929. First conceived by Claude Dornier in 1924,^[1] planning started in late 1925 and after over 240,000 work-hours it was completed in June 1929.^[2]

During the years between the two World Wars, only the Soviet Tupolev ANT-20 Maksim Gorki landplane of a few years later was physically larger, but at 53 tonnes maximum takeoff weight it was not as heavy as the Do X's 56 tonnes.

The Do X was financed by the German Transport Ministry and in order to circumvent conditions of the Treaty of Versailles, which forbade any aircraft exceeding set speed and range limits to be built by Germany after World War I, a specially designed plant was built at Altenrhein,^[1] on the Swiss side of Lake Constance.

The type was popular with the public, but a lack of commercial interest and a number of non-fatal accidents prevented more than three examples from being built.