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Aviation History
1919
1919 - 0834.PDF
JUNE :6, 1919 with linen, doped and painted. The axle is of the divided type, hinged in the centre, and springing is by means of rubber shock absorbers. The tail skid is of simple construction, as shown in the photo graph. It is made of ash and has a steel wearing shoe. It is sprung by rubber cord. In general arrangement the main planes follow modern practice. The roots of the lower planes are attached to the sides of the fuselage, while the two halves of the top plane are bolted to a centre section carried on four raked struts from the body. As already mentioned, there is only one pair of inter- plane struts on each side. These struts are of wood, while the four centre section struts are streamline steel tubes. The arrangement of the wing bracing is somewhat unusual. The landing wires do not present any departures from usual practice, being in the plane of the struts. The lift wires, however, are arranged somewhat differently. Although not being in duplicat e in the usual sense of the word, the lift wires are four in number on each side. Perhaps their arrangement may be best described by. saving that the four lift wires form a letter M, the two top points being secured to the top of the inter-plane struts, while the three lower points are anchored to points on the fuselage. In this manner not only is the lift distributed over a considerable length of the body, but by the an gularity of the wires the internal drag bracing is relieved of some of its load. Constructionally the planes are built-up in the usual Avro manner. The main wing spars are of built-up box section, while the leading edge is of wood spindled out to a U section. The wing tips and the trailing edges are in the form of steel tubes. The wing ribs are of the wood girder type, with box girder ribs taking the compression load imposed by the internal drag bracing. Ailerons are fitted to both top and bottom planes, the upper and lower flaps being connected by wires. From the scale drawings of the machine it will be seen that the tail planes and elevators are of very graceful outline, while the rudder is of the usual Avro shape ; this shape of rudder, by the way, has formed one of the distinctive features of the Avro machines for a number of years. No fixed vertical THE AVRO BABY.—View of the mounting of the 35-40 h.p. Green engine. fin has been fitted, as this has been found unnecessary in such a small machine. With regard to the performance of the Avro Baby, this can only be described as uncommonly good for a machine of so low power. As the accompanying climb chart will show, the climb curve is practically a straight line, the rate of climb being very good for the power. As regards horizontal speed, this is about 78 m.p.h. near the ground, or in other words THE AVRO BABY.—On left, view of the fuse/age, showing pilot's seat and controls ; and on the right, the tail skid. 834
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