Designed by Harris Booth, the Blackburn single-seat fighter triplane was also intended to carry a single Davis two-pounder quick-fire recoilless gun firing from the nose of the nacelle and was conceived for the anti-Zeppelin role. With a fabric-covered airframe, the triplane was initially flown early in 1917 with a 100hp Clerget 9Z nine-cylinder rotary engine driving a four-bladed propeller. The Clerget was soon replaced by a Gnome Monosoupape nine-cylinder rotary of 100hp driving a two-blade propeller and the triplane was accepted by the Admiralty on 20 February 1917, but was struck off charge as unsatisfactory four weeks later, on 19 March.
Take-off weight: 680 kg / 1499 lb
Empty weight: 458 kg / 1010 lb
Wingspan: 7.31 m / 23 ft 12 in
Length: 6.53 m / 21 ft 5 in
Height: 2.59 m / 8 ft 6 in
Wing area: 20.53 sq.m / 220.98 sq ft
Max. speed: 145 km/h / 90 mph