Editing AD Flying Boat (section)

==Design and development==
Designed in 1915 by the British [[yacht]] designer [[Linton Hope]],<ref name="Bruce British p3">Bruce 1957, p.3.</ref> the aircraft was of conventional [[biplane]] [[flying-boat]] configuration, and also featured a biplane [[Empennage|tail]] with twin fins and [[rudder]]s. The pilot and observer sat in tandem in the nose, with the [[Piston engine|engine]] and [[pusher propeller]] mounted behind them, between the wings. The wings could be folded forwards to facilitate shipboard stowage.

Two prototypes were constructed in 1916 by Pemberton-Billing Ltd (later to become [[Supermarine|Supermarine Aviation Works]]).<ref name="Bruce British p3"/> The first prototype was intended to be powered by a 150&nbsp;hp (112&nbsp;kW) [[Sunbeam Nubian]] engine, but as this was not ready to use, a {{convert|200|hp}} [[Hispano-Suiza 8]] was substituted.<ref name="Bruce p4">Bruce 1957, p.4</ref> The aircraft performed poorly both on the water and in the air, demonstrating severe [[Bow (watercraft)|fore]] and [[aft]] vibration during take-off, while subject to excessive [[Flight dynamics|yaw]] during flight. After these problems were solved by producing revised versions of the hull, and the fin and rudder, the AD Flying Boat was able to be ordered into production.<ref name="Andrews & Morgan p23">Andrews and Morgan 1987, p.23.</ref><ref name="Londonp20-23">London 2003, p.20-23.</ref> A total of 80 aircraft were ordered, and 27 machines were built.<ref name="Andrews & Morgan p355">Andrews and Morgan 1987, p.355.</ref> Examples were tested with [[Sunbeam Arab]] and [[Wolseley Python]] engines.<ref name="Londonp20-23"/>