There are hundreds of public domain images in the Flickr Commons contributed by the National Archives of the United Kingdom. There are three collections: Africa Through a Lens; Artwork, Artifacts and Documents; and Photography.
German Graf Zeppelin flies over St. Paul’s Cathedral while on a press visit to London. 1930
A British made Cierva Autogiro flies over Manhattan Island. The brainchild of Spanish aeronautical engineer Juan de la Cierva, the autogyro was developed in the early 1920s.
Hiram Maxim’s Glider
The Anglo-American inventor of the machine gun, Sir Hiram Maxim experimented unsuccessfully with powered flight during much of the 1890s. In 1911 he established a company to develop military aircraft with Louis Blériot, the first man to fly across the English Channel and engineer Claude Grahame White, one of Britain’s first qualified pilots. c.1915
Fighter squadron in formation. Photograph from the log book of RAF Squadron Leader B.J.E. Lane. 1940-2.
Photograph from the Trench Warfare Section of the Ministry of Munitions showing a man wearing breathing apparatus against gas attack. WWI
In the early 20th century sailing ships would compete to be the first to bring a grain cargo from Australia to the UK. Built in 1911 S.V. Passat was the winner of the final race in 1949/50, reaching Penarth, Wales in four months. Its cargo of wheat was destined for the mills of Methodist mill owner and film magnate J. Arthur Rank.
‘With Captain Scott to the South Pole (British Antarctic Expedition)’. Steam Yacht ‘Terra Nova’ with dogs on Ice at side.’
“This image shows a single frame from the very short (3-4 frame) sections of nitrate film stock accessioned at The National Archives from Herbert Ponting’s footage of the Antarctic.” c.1911.