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Aviation History
1954
1954 - 0818.PDF
366 FLIGHT PERCIVAL PEMBROKE . was increased from 56ft to 64ft 6in; Boscombe Down flight tests showed that no increase in aileron area was required. (2) With this increase in span, the depth of the front spar bridge-beam was kept constant across the fuselage, as opposed to the previous cut-away shape. (3) The fuselage floor was reinforced to withstand 15g instead of 9g. (4) The long-stroke, twin-wheel under carriage of the later Sea Princes was retained. (5) The lengthened nose of the Sea Prince T.l was retained. (6) Shortened runs in the pneumatic system were incorporated, and other detailed maintenance improvements were effected. DESIGN AND CONSTRUCTION The Pembroke C. Mk 1 is a high-wing monoplane of all-metal construction. The two power units incorporate Alvis Leonides Mk 12701 engines, which drive diree-bladed, constant-speed, feathering airscrews through reduction gears. Fuselage.—The fuselage is of stressed-skin, semi-monocoque construction, and consists of two main assemblies: the front sec tion, comprising the cockpit and hinged nose; and the main section, comprising the cabin, rear fuselage and tail cap. The two assemblies are joined together by bolts through their end-frames, the rear frame of the front section being a reinforced bulkhead in which an aperture permits access to the cockpit from the cabin. The front fuselage is constructed of vertical frames and Z-section longitudinal stringers, covered by a light-alloy skin. Two longitudinal beams form the sides of the nosewheel bay. The cockpit floor is formed by a platform extending between the rear bulkhead, another just aft of the nose hinge-line, and FIBREGLASS NOSE the sides of the fuselage, and is supported by the two nose-undercarriage beams and the vertical formers attached to them. Forward of the front cockpit bulkhead is a compartment which houses pneumatic equipment, access to which is by the hinged nose. The nose is of light-alloy construction, with the excep tion of the moulded Fibreglass front cap. The framework of the cockpit canopy is riveted to the front fuselage structure, and extends back to the rear bulkhead of this section. It accommodates the windscreens, sliding and fixed side-panels and fixed upper panels, and provision is made for the fitting of screens for instrument-flying practice. The forward portion of the main fuselage contains the cabin, 8 REARWARD F PASSENGER SI
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