Career
Blennerhassett served originally in the Irish Rifles before transferring to the Royal Flying Corps on 24 March 1916. On the last day of the year, he was posted to 18 Squadron as an observer/gunner. On 4 February 1917, while manning the guns for fellow ace Robert Farquhar, he drove a German Albatros Doctorate.II down out of control north of Le Sars.
Two months later, on 5 April, while flying with Victor Huston, he drove down two more Doctorate.IIs at Inchy.
He shared in the destruction of a fourth Doctorate.II the following day. Ten days later, he forced another Doctorate.II down out of control to become an ace.
On 3 May 1917, he drove down an Albatros Doctorate.III into Bourlon Wood. Twenty days later, he destroyed a Doctorate.III and drove another out of control.
He subsequently qualified as a pilot, being appointed a Flying Officer on 24 October 1919.
As a pilot, he served in a number of squadrons. After postwar service in India, Blennerhassett resigned his commission on 22 January 1922.
