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Aviation History
1924
1924 - 0598.PDF
SEPTEMBER 25, 1924 THE BRISTOL " BROWNIE LIGHT MONOPLANE, BRISTOL rear view. CHERUB " ENGINE : Three-quarter bolts for the latter being slightly staggered so as to clear each other. Exceptions from this form of construction occur where local considerations demand. Thus, at the point, of attach ment of the wing halves wood bulkheads are incorporated, as shown in Fig. 7. These are frames covered both sides with three-ply so as to form boxes. The undercarriage strut attach ments, also, are located on these wooden bulkheads, as indicated in the sketch. The cockpits are arranged tandem fashion, and with the low position of the wing the view is exceptionally good, except straight down from the rear cockpit, where the large chord at the root of the wing obscures it to some extent, although this is probably of small importance as the pilot can .look forward over the leading edge for landing. The controls are of usual type except for the aileron controls already referred to. The undercarriage is of somewhat unorthodox design, the SOME 'BRISTOL " BROWNIE " CONSTRUCTIONAL DETAILS : Some of our sketches show features common to all three Bristol machines, but those relating to the wing structure show the all-metal con struction. 1, the root of the port wing. Note the very original spar web, consisting of a circular steel tube bent zig-zag fashion and flattened out at the points of attachment to the spar flanges. 2, details of the attachment of the leading edge. 3, 4 and 5, details of the spar construction. Towards the wing tip, where the spar depth becomes smaller, the zig-zag web is not continued, and the construction is of the form shown. 6 illustrates the mounting of the " Cherub " engine on four tubular cantilever pillars without bracing. These pillars are permanently bolted to the engine, and are attached to the engine bulkhead by unions. 7 shows the attachment of the wing to the fuselage. A wood bulkhead is built-in at this point, although the fuselage is of steel tube construction, and the upper spar flange attachment has provision for setting dihedral and incidence by the micrometer adjustment shown. 8 shows a typical fuselage joint. 598
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