I guess we better cover the other manufacturers that begin with D. I guess chronological order will do, so let us return to the halcyon days of the Edwardian era. I think this may well be the second oldest airworthy aircraft in the world it's a 1910 Deperdussin monoplane. The oldest airworthy aircraft in the world is also owned by the Shuttleworth collection and is a 1909 vintage Bleriot XI. At 106 years old she is now limited to hops in a straight line.IMAGE LINK: https://flic.kr/p/Ft1KSY Deperdussin 1910 Monoplane by Alan Evans, on Flickr
From 1930 we have the Desoutter I, Despite the name it was a British built aircraft, there were 28 of the MK I version and 13 of the MK II built. Only three survive today. In the UK National Flying services bought 19 aircraft and they were all painted in this distinctive black and orange colour scheme. This MK I is at the Shuttleworth Collection, while the other two surviving aircraft are in Australia, with one in the Queen Victoria Museum Launceston and the other airworthy one owned by the Australian National Aviation Museum in Melbourne.IMAGE LINK: https://flic.kr/p/gYer6z Desoutter I by Alan Evans, on Flickr
Now I am going to cheat a little here, as I really need to include a both names for what was said by Ike to be one of the three most important things in the winning of WWII, they were the Willis Jeep, this and I forget the third. First up is the British option, this one preserved by the RAF Battle of Britain Memorial Flight, based at RAF Coningsby Lincolnshire. The Douglas C47 Dakota Mk III, 'KWCHERBCHEN'IMAGE LINK: https://flic.kr/p/Fc8BYG Douglas C47 Dakota Mk III, 'KWCHERBCHEN' by Alan Evans, on Flickr
Of course better known in the US as the C47 Skytrain.
IMAGE LINK: https://flic.kr/p/eKhKUx Douglas C47 Skytrain by Alan Evans, on Flickr
Finally we have the Franco-German joint project, by two companies both starting with the letter D the Dassault/Dornier Alpha Jet E.IMAGE LINK: https://flic.kr/p/GAgiJu Dassault/Dornier Alpha Jet E by Alan Evans, on Flickr