The ASL Valkyrie was a canard pusher configuration aircraft designed by the Aeronautical Syndicate Ltd in 1910. Examples were widely flown during 1911 and were used for instructional purposes at the ASL flying school, which was the first occupant of Hendon Aerodrome in London. Design and development Following two designs styled simply monoplanes Nos. 1 and 2, ASL's third design was called the Valkyrie. All three were of tail-first or canard layout with rear-mounted engines and pusher propellers. The Valkyrie A or Valkyrie I took place over the summer of 1910 and the aircraft was first flown in October 1910 at the newly established Hendon Aerodrome, where the ASL had leased three hangars next to those occupied by the Blériot school. Although this aircraft shared the same canard configuration as its predecessor, there were significant alterations. It was powered by a 35 hp 4-cyl Green C.4 engine mounted in front of the leading edge of the wing, driving a 7 ft 3 in (2.21 m) pusher propeller directly in front of the centre-section of the wing, the leading edge of which was set back from that of the outer sections. A pair of foreplanes, one fixed and the other moveable, were mounted on a pair of widely spaced wire-braced mahogany side-frames, each having a straight upper boom and a curved lower member. The twin rudders were initially mounted on the kingposts at the rear of these frames, in line with the trailing edge of the wing but after trials were moved aft, each being mounted on two short booms. In addition a small area of the sideframes at the front of the aircraft was given a fabric covering. Work was immediately started on two more aircraft, both with the same general arrangement. The first to fly, on 12 November, was a smaller aircraft referred to as the Racer or Valkyrie B. A larger machine, the Passenger Carrier or Valkyrie C was flown a few days later and is sometimes referred to as the Valkyrie II, its works number. The first Type B built is sometimes referred by its works number as the Valkyrie III. Both types were of broadly similar layout and construction to the Valkyrie A, differing principally in size and the engine that was used. The Type B, which seated two people side by side in front of the leading edge, was powered by a 50 hp (37