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Aviation History
1920
1920 - 0391.PDF
APRIL 8, 1922 Three-quarter rear view oLthe American-built Caproni biplane $? in. cable is employed, and all lift cables are doubled except in the outer section. The landing cables are single. All the cables are spliced and not soldered, and the tumbuckles are located at the bottom of the struts and are received directly by socket terminals. Two drift wires run from the nose of the nacelle to the tops and bottoms of the front inner intermediate section struts. With the exception of some of the centre section struts the interplane struts are of stream-line section steel tubing, or round-section steel tubing stream -lined with spruce fairings. The strut sockets are all of the same general design, but are which serve as anchorages for the turnbuckles and cable endsof the interplane bracing. The internal bracing of the wings is, as usual, of cables and tie-rods. The covering is Grade Alinen nailed on the cap-strips and edges, with maple batten strips screwed above the linen corresponding to the ribs. The tail consists of a high aspect ratio horizontal stabiliser,a one-piece elevator, and three balanced rudders mounted above the latter. The horizontal stabiliser is provided witha positive incidence change gear. All the tail surfaces are of steel construction (spruce also being employed in the case ofthe rudders), the ribs of the horizontal stabiliser being made The American- built Caproni bi- plane in flight not interchangeable, being made heavier towards the centreof the machine to meet the increased stresses, as is also the case with the interplane struts. These strut sockets consistof two steel plates welded to the fore and aft sides of a square steel sleeve, which is slipped over the outside ends of thespars and secured to the latter by three J-in. bolts. Three lugs formed on the steel plates project beyond the spar, thecentral lugs receiving the interplane strut—a bolt passing through lugs and strut—and the outer lugs carrying bolts from pressed sheet steel. The stabiliser is secured to thefuselages by means of steel tubes, faired with laminated spruce, two extending from the bottom of each tail post outward tothe front and rear spars of the stabiliser, and two extending inwards, also to the front and rear spars. The rudders araheld in place by means of steel posts, trussed together by wire, the two outer rudder posts working in the fuselage stern posts,whilst the central rudder post engages with a socket brazed on the rear spar of the stabiliser. A pair£of stream-lined An Italian prototype Caproni, which differs from the American types in minor details only 391
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