Dornier Do X

When the mighty 12-engine Dornier Do X flying boat made its first test flight on 12 July 1929 it was the largest aeroplane in the world. Designed by Claude Dornier to operate on transatlantic routes, this leviathan was built on the Swiss shore of Lake Constance. .
The engines were arranged as six tandem pairs on the high, strut-braced, fabric-covered wing. The two-step metal hull had three decks, and the main deck was able to accommodate 66-100 passengers in considerable luxury – the facilities included a bar, a smoking room, and a dining salon.
The short upper deck contained the cuntrol room for two pilots, the captain’s cabin and navigating room, and a radio cabin. The aircraft’s original Siemens ,Jupiter air-cooled engines proved inadequate and had to be replaced by water-cooled Curtiss Conquerors. The Do X was then ready to undertake a test flight across I he Atlantic.
From November 1930 to August 1931 it followed a circuitous path to New York via Lisbon and South America, encountering a number of difficulties. The return journey to Berlin the following May took only four days, but the Do X had not proved commercially viable. After a brief spell with Lufthansa the huge aircraft ended its days as an exhibit in a Berlin museum, where sadly it was destroyed by Allied bombs during World War II.