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Conceived by Dr. Claudius Dornier, the design took seven years to complete and two years to build. On October 21st, the plane took off carrying 169 people consisting of 150 passengers, 10 crew and 9 stowaways, easily breaking the world record for the number of people aboard a flight - a record that would not be tested for 15 years. The luxurious accommodations and service on the Do X were in keeping with the standards of transatlantic liners. Several cabins on the main deck held passengers comfortably on 32 double seats and two single seats, while the cockpit, captain's cabin, navigational office, engine control room and radio office could be found on the upper deck along with quarters for the 14 man crew. The lower deck held fuel and stores.
The Do X took off from Friedrichshafen, Germany on Nov 3, 1930 commencing its trans-Atlantic proving flight. The route took the Do X to Lisbon, down the Western African coast, across the Atlantic to South America, and north to the United States finally reaching New York on Aug 27, 1931. While the Do X was not a commercial success, it was an important experiment in early aviation. It remains one of the most extraordinary seaplanes in history.