27 November 1913

Tests were carried out on 27 November 1913 with the firing of a Lewis machine-gun mounted on a two-seat pusher Grahame-White Boxkite (known by virtue of its pair of rudders as the "Bi-rudder Bus"). The Boxkite was flown by Marcus D. Manton, the gun being fired from the air at ground targets at Bisley, Hants. The engine was the 50 h.p. Gnome, and the machine was developed later into the Type 15 trainer used by the R.F.C. and the R.N.A.S, during the 1914-18 War.