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Aviation History
1917
1917 - 0723.PDF
JULY 19, 1917. l/tlGHT) A NEAT SCHOOL MACHINE. IN the training of a Service pilot it would often b_ an advantage if a machine were available on which, after having got to feel quite at home in the ordinary training machine, he could put in a little extra practice before making the admittedly somewhat long step to the high-powered fast Service aeroplane. It was with this object in view that the small biplane illustrated in the accompanying photographs was built. This machine, which was designed for the steam-bent ash. As will be seen from the illustra- tions, there is only one pair of inter-plane struts on each side, the machine following in this respect the lines of a fast single-seater scout. As regards the wing bracing, this is effected by a somewhat unusual combination of steel tubes and • stream-line wires. The lift "wires " consist of stream- line steel tube measuring \ in. in width by about xa in. thick, and of R.A.F. wires. The landing THE W.F. AND E. CO. BIPLANE—Three-quarter front view. Wright Forge and Engineering Co., Ltd., of Tipton, Staffs., by Mr. W. West wood, is a light two-seater, fitted with a 40-45 h.p. Anzani engine. It is stated by the designer to have a speed range of from 30 to 65 m.p.h., and its climb, although not measured, appears to be quite good. The upper and lower planes are of the same span, and both are fitted with ailerons interconnected in the usual manner. The top plane is built up in three " wires " are steel tubes only. External drift wires run to the nose of the body, and assist the internal wing bracing, which is in the form of stranded cable. A flat non-lifting tail plane is secured to the top of the body and stayed with stream-line steel tubes. To the trailing edge of the tail plane is hinged the divided elevator, which is operated by means of stranded cables from an external crank lever on the side of the body. The rudder is hinged to the stem THE W.F. AND E. CO. BIPLANE.—Three-quarter rear view. sections—a centre section and the two outer main sections. The bottom planes are, as in the majority of modem biplanes, attached to the sides of the body. Structurally the wings are built up of ash spars reinforced with steel, and of ribs having spruce flanges and three-ply webs. The leading and trailing edges are of spruce, except for the tips, which are post of the body, and is partly balanced by a forward projection as shown in the illustrations. Aerodynamically the body is of the ordinary flat- sided rectangular section type, but constructionally it differs somewhat from the majority of other aeroplane bodies. The designer argues—quite rightly, we think—that for a school machine,which is subject 723
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