Lieutenant Roger Bolton Hay was a World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

 flying ace

Flying ace

A flying ace or fighter ace is a military aviator credited with shooting down several enemy aircraft during aerial combat. The actual number of aerial victories required to officially qualify as an "ace" has varied, but is usually considered to be five or more...

 credited with five aerial victories.

Hay was one of the founding members of 48 Squadron, which was the first to be equipped with Bristol F.2 Fighter

Bristol F.2 Fighter

The Bristol F.2 Fighter was a British two-seat biplane fighter and reconnaissance aircraft of the First World War flown by the Royal Flying Corps. It is often simply called the Bristol Fighter or popularly the "Brisfit" or "Biff". Despite being a two-seater, the F.2B proved to be an agile aircraft...

s. He began his victory string during Bloody April

Bloody April

During the First World War, the month of April 1917 was known as Bloody April by the Royal Flying Corps . The RFC suffered particularly severe losses — about three times as many as the Imperial German Army Air Service over the same period — but continued its primary role in support of the ground...

, 1917, with wins on 23, 24, and 27 April. The first two victories are shared with fellow aces Fred Holliday, Anthony Wall

Anthony Wall (aviator)

Captain Anthony Herbert William Wall MC was a World War I flying ace credited with 16 aerial victories. He began his victory list on 6 April 1917, scoring from the rear seat of a Bristol F.2 Fighter piloted by Australian ace Fred Holliday. On 24 April, he became an ace by scoring twice...

, Ernest Moore, and William Winkler. The third is also shared, with Maurice Benjamin

Maurice Benjamin

Captain Maurice Arthur Benjamin was a London born South African flying ace active during World War I. He was credited with eight aerial victories while serving as an observer/gunner in two-seater fighters.-Early life:...

 and William Price. He scored twice more, on 15 June and 12 July 1917. His final total was two destroyed and three driven down out of control.