Vickers E.F.B.6

Progressive changes introduced by successive E.F.B.3s led to the E.F.B.5 - the E.F.B.4 being a project with a more streamlined nacelle centred between the wings and only two tailbooms - which was flown from Joyce Green to Brooklands on 17 July 1914. In parallel, Vickers developed the E.F.B.6, which, basically similar to the E.F.B.5, had longer-span upper wings. It lacked top decking between the two crew seats and had ailerons in the upper wings only. At Brooklands on 14 July 1914, the E.F.B.6 was taken on strength by the Royal Flying Corps when World War I began, but was not developed.