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Airdisco Phi-Phi
The Airdisco Phi-Phi was a single seat monoplane glider, designed specifically for the first British gliding competition held at Itford Hill in 1922, an endurance event. It recorded one competitive flight but crashed on a second attempt.
==Design==
In August 1922 the ''Daily Mail'' newspaper offered a £1,000 prize for the longest duration flight by an unpowered, heavier than air aircraft. The competition was to be organized by the Royal Aero Club, who chose the site (Itford Hill, on the Sussex South Downs near Lewes) and the date (16–21 October). This gave competitors six weeks to design, build and transport their entries.〔〔 13 arrived in time and one of these was the Airdisco Phi-Phi, competition number 27.〔
The Phi-Phi was an all wood parasol monoplane. Its wing section was thick enough to allow for semi-cantilever construction, supported centrally by two pairs of cabane struts and two steeply rising lift struts from the lower fuselage longerons, though there were a pair of drag wires from nose to wing tip. The wing plan was unusual compared with the straight edges of most of its competitors, with a gently curving leading edge, elliptical tips and straight trailing edge. It had the highest aspect ratio (13.6) of all the Itford gliders. The tip-mounted ailerons were horn balanced, again unusual.〔〔
The Phi-Phi had a rectangular cross-section fuselage, with sides that curved in at the nose and, more gently, towards the tail. In plan the sides were straight edged, forming an elongated rhomb. A low aspect ratio, rectangular, all-moving tailplane was hinged on the extreme rear fuselage. The fin and rudder formed a tilted, cropped parallelogram with a hinge line above that of the elevator. The cockpit was immediately under the leading edge, well behind the nose.〔 Originally the Phi-Phi had a pair of small main wheels rigidly attached to the lower fuselage directly below the cockpit and aided by a sprung, articulated tailskid. The wheels were replaced at Itford by a pair of skids and then by skids with small wheels attached to them.〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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