There are individuals whose contribution to the Great War raises them head and shoulders above others. For some, this was because of their action on the battlefield; for others it was the tireless, inventive application of their minds.
Conrad Hugh Dinwiddy was a surveyor working in his father's London-based architectural practice at the outbreak of the Great War. He was an active local Conservative politician who undoubtedly would have become an MP, a tournament tennis player, an experienced mountaineer, and a journalist.
In June 1915, when on night-duty as a Special Policeman, and pondering the Zeppelin threat to the capital, he began to devise a range-finder that would allow anti-aircraft fire to be swiftly and accurately brought to bear on aircraft. The principles were in place by the morning, and he had a full scheme within a week. He then devised a slide-rule which would allow a battery commander to make the calculations necessary for the final fuze-setting to be made.
In December 1916 he was sent to the Western Front to a 6-inch howitzer battery. Within two months he was a captain, second-in-command; and within six was a major, commanding the battery. His commitment to applying his skills and intellect did not cease – during his first two months of being in action he invented a method using lit parallel aiming posts to improve the accuracy of night firing. He submitted a scheme for barge-mounted batteries, and methods of ammunition supply using monorail.
Peter's article ' The Dinwiddy Rangefinder and the Defence of London' was published in Stand To!
in 2020.