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Aviation History
1918
1918 - 0255.PDF
MARCH 7, 1918. B D mm1 ¥////////£ a lanbad in. 1ncbcs. fit, 1I « / 2 3 a s Scale in c/m A L BAT FLOS 2 SCATTER. . B C K£Y TO SECTIONS . D E Fig. 6.—Sections and dimensions of the longerons of the Albatros biplane. bulkheads from sliding along the longerons, as they are cut off where a bulkhead occurs, against the front and rear sides of which they abut. In some places, as for instance in the front of the body where the cover- ing is in the form of an aluminium cowl over the engine, the strips are omitted and the cowl attached to turn- buttons as shown in the sketch Fig. 7. At such points the bulkheads are prevented from sliding along the longerons by a long wood screw passing horizontally through the longeron into the bulkhead. The middle longerons, which, as already pointed out in a previous article, are horizontal, i.e., parallel to the propeller shaft, are of smaller overall dimensions than are the four main longerons. They are rectangular section, lightened in places by stop-chamfering, as shown in a and b Fig. 6. Fig. 8 shows, in side elevation and plan, the general arrangement of the fuselage, and should, in conjunction with the various sections and key diagrams, explain fairly clearly the general lay-out of the body. It will be noticed that in plan the sides of the body are straight from the tail post forward to the pilot's cockpit. For ease in manufacture it is an advantage that the ribs of the tail plane should be at right angles to the spars, and in order to effect this it is necessary that the sides of the body should be parallel for the length of the tail plane. Since, however, to provide for this the longerons would have to be changed from a con- verging direction to a parallel one which would necessi- tate a somewhat sharp bend in them at the point where the tail plane commences, and as, moreover, the depth of the tail plane is not the same as that of the body except at the extreme rear, a different course has been followed. From the point where the tail begins two extra longerons on each side have been built into the bulkheads of the. body. These two short longerons have, in plan, a direction parallel to the line of flight, while the main longerons continue on their converging course. This arrangement is indi- cated in the plan view Fig. 8. In side elevation the short longerons, against which lie the inner ribs of the tail plane, have the same curvature as the tail plane. In this manner the lines of the rear part of the body are not spoiled, while an easy flowing curve is provided for running the tail plane into the body. The arrangement will be further made clear by reference to Fig. 1, page 224. Reference has already been made to the peculiar Fig. 7.—Sketch showing turnbuttons securing enginecowl to upper longerons. The bulkhead is prevented from shifting by a wood screw going through thelongeron into the bulkhead. 251 H 2
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