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Aviation History
1918
1918 - 1488.PDF
DECEMBER 26, 1918 _ THE L.V,G. TWO-SEATER BIPLANES •• ; " , [Issued by Technical Department (Aircraft Production), Ministry of Munitions.'] (Concluded from page 1431.) Wing Construction (THESE details were all noticed in the C.VI. machine, asin the earlier type the planes are still covered with fabric.) Both front and rear spars are of the box type, and wrappedwith fabric. Sections drawn to scale are given in Fig. 8, but these drawings do not show internal construction, as thespars have not yet been divided. The overall height and width of each spar, taken respectivelyparallel and perpendicular to the vertical walls, are :—Upper plane, front spar, height 3$ in., width 1-^ in. ; rear spar,height 3 in., width i||- in. ; lower plane, rear spar, height 3 in., width i\\ in. ; front spar, height 2|- in., width i\\ in. It has been possible to draw a section of the front spar ofthe C.V. machine, and the result is given in Fig. 9. There is every reason to believe that all the other spars of theL.V.G. are of similar construction. Fig. 10 shows a crude but effective method of repairing a broken spar. The repairwas carried out by the enemy, probably in the field. The leading edge is of the customary C section, and isfollowed at 7 in. interval by the front spar. The space while those of the C.VI. are not. The respective areas aregiven on the first page of the report. With regard to the constructional features, only those of the later type can bedescribed. The whole construction is of wood, with the exception of the aileron lever, a sketch of which is given(Fig. 11). This is of the usual curved type in the C.V. machine (see Fig. 12), but is made to serve as a rib also in the C.VI.type. The wooden ribs, together with the wood leading and trailing edges, form a structure which is very light.Both machines have the ailerons hinged to a false spar some distance behind the rear spar, and the hinges are all of thetype that has already been described in connection with the wing attachments (see Fig. 13). . • Struts The L.V.G. is one of the few enemy aeroplanes that employinterplane struts of wood. They are of the shape shown in, Fig. 14, and are of streamline section (2^ in. x i-£f in.),slightly hollowed out for lightening purposes. Fabric is wrapped round the strut in three places, and the form_of y ^ /, // • 1 1X 9. i. VO. L.V.G. Constructional Details.—8. C.VI. wing spar sections ; 9. Front spar section of C.V. ; 10. Field repair of broken spar ; 11. Aileron crank of C.VI. ; 12, Aileron crank of C.V. ; 13. Aileron hinge of both types. J between the two spars—25! in. wide—is braced with cables and piano wire, and contains four ash compression struts of I section, which are simply butted into sockets obviously intended to carry steel tubes. (These compression struts are steel in the C.V. model.) The distance from the rear spar to the wire trailing edge is 2 ft. 6f in. The ribs, of which a section is shown, are of the usual type, and are spaced at intervals of i6| in., centre to centre. They are unlightened. Equally between them are placed two false ribs—mere strips of wood let into the leading edge and tacked to the spars. These false ribs have floating ends 7$ in. behind the rear spar. The construction of the lower plane does not differ from that of the upper plane just described, except that the false ribs are not found in it. AileronsThe ailerons of the L.V.G. no longer possess the peculiar step in the trailing edge that has for so long been associatedwith the design, and the ailerons are rather different in the two types. The C.V. model has ailerons which are balanced the strut sockets is made clear in the sketch (Fig. 14), whichshows one of the C.V. struts. The types of strut socket employed in the C.VI. machineis shown in Fig. 15, while Fig. 16 shows how the strut is attached to the spar. The socket is held in place on thestrut by simply inserting a suitable length of steel tube through a drilled hole in socket and strut and riveting overthe ends. As has already been mentioned, the centre section strutsare different in the two types. In the C.V. machine the cabane, the shape of which is made clear by the G.A. drawings,is made of streamline steel tubing. This has been changed, and the C.VI. model has parallel centre section struts ofwood, which are like the letter N when seen from the port side. Fig. 17 shows the pint between the spar of the centresection and the strut. The unusual arrangement of the cross-bracing of this centre section should be noticed in thefront view, G.A. drawings. The line of the front limb of the N is carried on by the thirdfuselage bulkhead, and_finishes at the front joint of fuselage 1457
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