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Aviation History
1932
1932 - 0272.PDF
FLIGHT, MARCH 25, 1932 EASY ENTRY AND EXIT : By dropping the top longerons of the fuselage, the cockpit doors can be made very deep, and both passengers can readily- escape by parachute in case of emergency. (FLIGHT Photo.) cockpit doors, which make it very easy to get into and out of the cockpits. The great degree of wing stagger, and the attachment of the rear lift wire to the front lower spar root, result between them in a particularly unhindered exit from the front cockpit, so that the occupant of this should have no more difficulty in jump ing out with his parachute in case of emergency than the man in the rear cockpit. In a machine capable of stunting, and indeed designed for aerobatics, this is a point of very great importance. Controllability and manoeuvrability are other very desirable features in a training machine, and these are present in full measure in the Avro " Cadet." The aileron control is particularly effective, even at very low speed, and with the Bristol - Frise balance the ailerons are com fortably light in operation. They are fitted to top and bottom planes, but the balance extends over a relatively small proportion only to avoid over balancing. In a machine designed for school work, and which therefore will be called upon to make a very large number of landings, the undercarriage is often the deciding factor in the durability of a machine. In the " Cadet " Mr. Chadwick has introduced a somewhat novel type of telescopic leg, in which coil springs are placed end to end, although actually working in parallel. The shock absorbing qualities are quite remarkable, and it would take a very bad landing indeed to cause serious damage to the structure. The Structure With a view to cheapness, and also because in several foreign countries timber is available in good qualities, the Avro '•' Cadet " has been made of com posite construction, i.e., it has wooden wings and a welded steel tube fuselage. The wings, which are of modified T.64 aerofoil section, are of normal wood construction, with I-section spindled spars and plywood ribs. The ailerons are of the Bristol-Frise type, and are fitted to upper and lower wings, but have been modified by extend ing the balance over a portion of them only, so that over balancing does not occur. A further advantage of this particular arrangement of the balance is that the leads from ailerons to control column become very straightforward indeed. The wing tips are rounded in plan form, and the overhanging portions are fined down to a thin edge. The fuselage is of the type of welded construction which Avros have employed for a considerable time, and is so well known that it will need no detailed descrip tion here. It will suffice if we recall briefly that the top and bottom longerons are connected by a series of diagonal struts, the SOME FUSELAGE DETAILS : Welded steel tube construction is used for the main structure of the fuselage. The top longerons are dropped in the centre portion to give deeper cockpit doors. The secondary structure is of wood, and attached to the primary structure by simple clips. (FLIGHT Sketches.) 256
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