DC-3 (or DST - Douglas Sleeper Transport ) flew for the first time on December 17 1935. The DC-3 became the mainstay of the US domestic airline network in the years prior to World War 2 and was used by the military during the war because of its versatility. The Douglas DC-3 was the first airliner to make a profit by carrying just passengers without the support of mail contracts or other forms of government subsidies. Here we see a KLM model, who were one of the early airlines use it.
© Science Museum / Science & Society Picture Library